CXF
Since Camel 1.0
Both producer and consumer are supported
The CXF component provides integration with Apache CXF for connecting to JAX-WS services hosted in CXF.
When using CXF in streaming modes (see DataFormat option), then also read about Stream caching. |
Maven users must add the following dependency to their pom.xml
for this component:
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-cxf</artifactId>
<version>x.x.x</version>
<!-- use the same version as your Camel core version -->
</dependency>
URI format
There are two URI formats for this endpoint: cxfEndpoint and someAddress.
cxf:bean:cxfEndpoint[?options]
Where cxfEndpoint represents a bean ID that references a bean in the Spring bean registry. With this URI format, most of the endpoint details are specified in the bean definition.
cxf://someAddress[?options]
Where someAddress specifies the CXF endpoint’s address. With this URI format, most of the endpoint details are specified using options.
For either style above, you can append options to the URI as follows:
cxf:bean:cxfEndpoint?wsdlURL=wsdl/hello_world.wsdl&dataFormat=PAYLOAD
Configuring Options
Camel components are configured on two separate levels:
-
component level
-
endpoint level
Configuring Component Options
The component level is the highest level which holds general and common configurations that are inherited by the endpoints. For example a component may have security settings, credentials for authentication, urls for network connection and so forth.
Some components only have a few options, and others may have many. Because components typically have pre configured defaults that are commonly used, then you may often only need to configure a few options on a component; or none at all.
Configuring components can be done with the Component DSL, in a configuration file (application.properties|yaml), or directly with Java code.
Configuring Endpoint Options
Where you find yourself configuring the most is on endpoints, as endpoints often have many options, which allows you to configure what you need the endpoint to do. The options are also categorized into whether the endpoint is used as consumer (from) or as a producer (to), or used for both.
Configuring endpoints is most often done directly in the endpoint URI as path and query parameters. You can also use the Endpoint DSL and DataFormat DSL as a type safe way of configuring endpoints and data formats in Java.
A good practice when configuring options is to use Property Placeholders, which allows to not hardcode urls, port numbers, sensitive information, and other settings. In other words placeholders allows to externalize the configuration from your code, and gives more flexibility and reuse.
The following two sections lists all the options, firstly for the component followed by the endpoint.
Component Options
The CXF component supports 6 options, which are listed below.
Name | Description | Default | Type |
---|---|---|---|
Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored. |
false |
boolean |
|
Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing. |
false |
boolean |
|
This option controls whether the CXF component, when running in PAYLOAD mode, will DOM parse the incoming messages into DOM Elements or keep the payload as a javax.xml.transform.Source object that would allow streaming in some cases. |
Boolean |
||
Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc. |
true |
boolean |
|
To use a custom org.apache.camel.spi.HeaderFilterStrategy to filter header to and from Camel message. |
HeaderFilterStrategy |
||
Enable usage of global SSL context parameters. |
false |
boolean |
Endpoint Options
The CXF endpoint is configured using URI syntax:
cxf:beanId:address
with the following path and query parameters:
Query Parameters (36 parameters)
Name | Description | Default | Type |
---|---|---|---|
The data type messages supported by the CXF endpoint. Enum values:
|
POJO |
DataFormat |
|
The WSDL style that describes how parameters are represented in the SOAP body. If the value is false, CXF will chose the document-literal unwrapped style, If the value is true, CXF will chose the document-literal wrapped style. |
Boolean |
||
Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored. |
false |
boolean |
|
To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this option is not in use. By default the consumer will deal with exceptions, that will be logged at WARN or ERROR level and ignored. |
ExceptionHandler |
||
Sets the exchange pattern when the consumer creates an exchange. Enum values:
|
ExchangePattern |
||
Configure a cookie handler to maintain a HTTP session. |
CookieHandler |
||
This option will set the default operationName that will be used by the CxfProducer which invokes the remote service. |
String |
||
This option will set the default operationNamespace that will be used by the CxfProducer which invokes the remote service. |
String |
||
The hostname verifier to be used. Use the # notation to reference a HostnameVerifier from the registry. |
HostnameVerifier |
||
The Camel SSL setting reference. Use the # notation to reference the SSL Context. |
SSLContextParameters |
||
Which kind of operation that CXF endpoint producer will invoke. |
false |
boolean |
|
Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing. |
false |
boolean |
|
Sets whether synchronous processing should be strictly used. |
false |
boolean |
|
This option controls whether the CXF component, when running in PAYLOAD mode, will DOM parse the incoming messages into DOM Elements or keep the payload as a javax.xml.transform.Source object that would allow streaming in some cases. |
Boolean |
||
To use a custom configured CXF Bus. |
Bus |
||
This option is used to set the CXF continuation timeout which could be used in CxfConsumer by default when the CXF server is using Jetty or Servlet transport. |
30000 |
long |
|
To use a custom CxfBinding to control the binding between Camel Message and CXF Message. |
CxfBinding |
||
This option could apply the implementation of org.apache.camel.component.cxf.CxfEndpointConfigurer which supports to configure the CXF endpoint in programmatic way. User can configure the CXF server and client by implementing configure{ServerClient} method of CxfEndpointConfigurer. |
CxfConfigurer |
||
Will set the default bus when CXF endpoint create a bus by itself. |
false |
boolean |
|
To use a custom HeaderFilterStrategy to filter header to and from Camel message. |
HeaderFilterStrategy |
||
Whether to merge protocol headers. If enabled then propagating headers between Camel and CXF becomes more consistent and similar. For more details see CAMEL-6393. |
false |
boolean |
|
To enable MTOM (attachments). This requires to use POJO or PAYLOAD data format mode. |
false |
boolean |
|
To set additional CXF options using the key/value pairs from the Map. For example to turn on stacktraces in SOAP faults, properties.faultStackTraceEnabled=true. |
Map |
||
Enable schema validation for request and response. Disabled by default for performance reason. |
false |
Boolean |
|
Sets whether SOAP message validation should be disabled. |
false |
boolean |
|
This option enables CXF Logging Feature which writes inbound and outbound SOAP messages to log. |
false |
boolean |
|
To limit the total size of number of bytes the logger will output when logging feature has been enabled and -1 for no limit. |
49152 |
int |
|
This option controls whether the PhaseInterceptorChain skips logging the Fault that it catches. |
false |
boolean |
|
This option is used to set the basic authentication information of password for the CXF client. |
String |
||
This option is used to set the basic authentication information of username for the CXF client. |
String |
||
The bindingId for the service model to use. |
String |
||
The endpoint name this service is implementing, it maps to the wsdl:portname. In the format of ns:PORT_NAME where ns is a namespace prefix valid at this scope. |
String |
||
This option can override the endpointUrl that published from the WSDL which can be accessed with service address url plus wsd. |
String |
||
The class name of the SEI (Service Endpoint Interface) class which could have JSR181 annotation or not. |
Class |
||
The service name this service is implementing, it maps to the wsdl:servicename. |
String |
||
The location of the WSDL. Can be on the classpath, file system, or be hosted remotely. |
String |
Message Headers
The CXF component supports 6 message header(s), which is/are listed below:
Name | Description | Default | Type |
---|---|---|---|
Constant: |
The name of the operation. |
String |
|
Constant: |
The operation namespace. |
String |
|
CamelDestinationOverrideUrl (common) Constant: |
The destination override url. |
String |
|
Constant: |
The response context. |
Map |
|
Constant: |
The authentication. |
Subject |
|
Constant: |
The request context. |
Object |
The serviceName
and portName
are
QNames, so if you provide them be
sure to prefix them with their {namespace} as shown in the examples
above.
Descriptions of the dataformats
In Apache Camel, the Camel CXF component is the key to integrating routes with Web services. You can use the Camel CXF component to create a CXF endpoint, which can be used in either of the following ways:
-
Consumer — (at the start of a route) represents a Web service instance, which integrates with the route. The type of payload injected into the route depends on the value of the endpoint’s dataFormat option.
-
Producer — (at other points in the route) represents a WS client proxy, which converts the current exchange object into an operation invocation on a remote Web service. The format of the current exchange must match the endpoint’s dataFormat setting.
DataFormat | Description |
---|---|
|
POJOs (Plain old Java objects) are the Java parameters to the method being invoked on the target server. Both Protocol and Logical JAX-WS handlers are supported. |
|
|
|
|
|
|
You can determine the data format mode of an exchange by retrieving the
exchange property, CamelCXFDataFormat
. The exchange key constant is
defined in
org.apache.camel.component.cxf.common.message.CxfConstants.DATA_FORMAT_PROPERTY
.
How to enable CXF’s LoggingOutInterceptor in MESSAGE mode
CXF’s LoggingOutInterceptor
outputs outbound message that goes on the
wire to logging system (Java Util Logging). Since the
LoggingOutInterceptor
is in PRE_STREAM
phase (but PRE_STREAM
phase
is removed in MESSAGE
mode), you have to configure
LoggingOutInterceptor
to be run during the WRITE
phase. The
following is an example.
<bean id="loggingOutInterceptor" class="org.apache.cxf.interceptor.LoggingOutInterceptor">
<!-- it really should have been user-prestream but CXF does have such phase! -->
<constructor-arg value="target/write"/>
</bean>
<cxf:cxfEndpoint id="serviceEndpoint" address="http://localhost:${CXFTestSupport.port2}/LoggingInterceptorInMessageModeTest/helloworld"
serviceClass="org.apache.camel.component.cxf.HelloService">
<cxf:outInterceptors>
<ref bean="loggingOutInterceptor"/>
</cxf:outInterceptors>
<cxf:properties>
<entry key="dataFormat" value="RAW"/>
</cxf:properties>
</cxf:cxfEndpoint>
Description of relayHeaders option
There are in-band and out-of-band on-the-wire headers from the perspective of a JAXWS WSDL-first developer.
The in-band headers are headers that are explicitly defined as part of the WSDL binding contract for an endpoint such as SOAP headers.
The out-of-band headers are headers that are serialized over the wire, but are not explicitly part of the WSDL binding contract.
Headers relaying/filtering is bi-directional.
When a route has a CXF endpoint and the developer needs to have
on-the-wire headers, such as SOAP headers, be relayed along the route to
be consumed say by another JAXWS endpoint, then relayHeaders
should be
set to true
, which is the default value.
Available only in POJO mode
The relayHeaders=true
expresses an intent to relay the headers. The
actual decision on whether a given header is relayed is delegated to a
pluggable instance that implements the MessageHeadersRelay
interface.
A concrete implementation of MessageHeadersRelay
will be consulted to
decide if a header needs to be relayed or not. There is already an
implementation of SoapMessageHeadersRelay
which binds itself to
well-known SOAP name spaces. Currently only out-of-band headers are
filtered, and in-band headers will always be relayed when
relayHeaders=true
. If there is a header on the wire whose name space
is unknown to the runtime, then a fall back DefaultMessageHeadersRelay
will be used, which simply allows all headers to be relayed.
The relayHeaders=false
setting specifies that all headers in-band and
out-of-band should be dropped.
You can plugin your own MessageHeadersRelay
implementations overriding
or adding additional ones to the list of relays. In order to override a
preloaded relay instance just make sure that your MessageHeadersRelay
implementation services the same name spaces as the one you looking to
override. Also note, that the overriding relay has to service all of the
name spaces as the one you looking to override, or else a runtime
exception on route start up will be thrown as this would introduce an
ambiguity in name spaces to relay instance mappings.
<cxf:cxfEndpoint ...>
<cxf:properties>
<entry key="org.apache.camel.cxf.message.headers.relays">
<list>
<ref bean="customHeadersRelay"/>
</list>
</entry>
</cxf:properties>
</cxf:cxfEndpoint>
<bean id="customHeadersRelay" class="org.apache.camel.component.cxf.soap.headers.CustomHeadersRelay"/>
Take a look at the tests that show how you’d be able to relay/drop headers here:
-
POJO
andPAYLOAD
modes are supported. InPOJO
mode, only out-of-band message headers are available for filtering as the in-band headers have been processed and removed from header list by CXF. The in-band headers are incorporated into theMessageContentList
in POJO mode. Thecamel-cxf
component does make any attempt to remove the in-band headers from theMessageContentList
. If filtering of in-band headers is required, please usePAYLOAD
mode or plug in a (pretty straightforward) CXF interceptor/JAXWS Handler to the CXF endpoint. -
The Message Header Relay mechanism has been merged into
CxfHeaderFilterStrategy
. TherelayHeaders
option, its semantics, and default value remain the same, but it is a property ofCxfHeaderFilterStrategy
. Here is an example of configuring it.
<bean id="dropAllMessageHeadersStrategy" class="org.apache.camel.component.cxf.transport.header.CxfHeaderFilterStrategy">
<!-- Set relayHeaders to false to drop all SOAP headers -->
<property name="relayHeaders" value="false"/>
</bean>
Then, your endpoint can reference the CxfHeaderFilterStrategy
.
<route>
<from uri="cxf:bean:routerNoRelayEndpoint?headerFilterStrategy=#dropAllMessageHeadersStrategy"/>
<to uri="cxf:bean:serviceNoRelayEndpoint?headerFilterStrategy=#dropAllMessageHeadersStrategy"/>
</route>
-
The
MessageHeadersRelay
interface has changed slightly and has been renamed toMessageHeaderFilter
. It is a property ofCxfHeaderFilterStrategy
. Here is an example of configuring user defined Message Header Filters:
<bean id="customMessageFilterStrategy" class="org.apache.camel.component.cxf.transport.header.CxfHeaderFilterStrategy">
<property name="messageHeaderFilters">
<list>
<!-- SoapMessageHeaderFilter is the built in filter. It can be removed by omitting it. -->
<bean class="org.apache.camel.component.cxf.common.header.SoapMessageHeaderFilter"/>
<!-- Add custom filter here -->
<bean class="org.apache.camel.component.cxf.soap.headers.CustomHeaderFilter"/>
</list>
</property>
</bean>
-
In addition to
relayHeaders
, the following properties can be configured inCxfHeaderFilterStrategy
.
Name | Required | Description |
---|---|---|
|
No |
All message headers will be processed by Message Header Filters
Type: |
|
No |
All message headers will be propagated (without processing by Message
Header Filters)
Type: |
|
No |
If two filters overlap in activation namespace, the property control how
it should be handled. If the value is |
Configure the CXF endpoints with Spring
You can configure the CXF endpoint with the Spring configuration file
shown below, and you can also embed the endpoint into the camelContext
tags. When you are invoking the service endpoint, you can set the
operationName
and operationNamespace
headers to explicitly state
which operation you are calling.
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:cxf="http://camel.apache.org/schema/cxf"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://camel.apache.org/schema/cxf http://camel.apache.org/schema/cxf/camel-cxf.xsd
http://camel.apache.org/schema/spring http://camel.apache.org/schema/spring/camel-spring.xsd">
<cxf:cxfEndpoint id="routerEndpoint" address="http://localhost:9003/CamelContext/RouterPort"
serviceClass="org.apache.hello_world_soap_http.GreeterImpl"/>
<cxf:cxfEndpoint id="serviceEndpoint" address="http://localhost:9000/SoapContext/SoapPort"
wsdlURL="testutils/hello_world.wsdl"
serviceClass="org.apache.hello_world_soap_http.Greeter"
endpointName="s:SoapPort"
serviceName="s:SOAPService"
xmlns:s="http://apache.org/hello_world_soap_http" />
<camelContext id="camel" xmlns="http://camel.apache.org/schema/spring">
<route>
<from uri="cxf:bean:routerEndpoint" />
<to uri="cxf:bean:serviceEndpoint" />
</route>
</camelContext>
</beans>
Be sure to include the JAX-WS schemaLocation
attribute specified on
the root beans element. This allows CXF to validate the file and is
required. Also note the namespace declarations at the end of the
<cxf:cxfEndpoint/>
tag. These declarations are required because the combined {namespace}localName
syntax is presently not supported for this tag’s
attribute values.
The cxf:cxfEndpoint
element supports many additional attributes:
Name | Value |
---|---|
|
The endpoint name this service is implementing, it maps to the
|
|
The service name this service is implementing, it maps to the
|
|
The location of the WSDL. Can be on the classpath, file system, or be hosted remotely. |
|
The |
|
The service publish address. |
|
The bus name that will be used in the JAX-WS endpoint. |
|
The class name of the SEI (Service Endpoint Interface) class which could have JSR181 annotation or not. |
It also supports many child elements:
Name | Value |
---|---|
|
The incoming interceptors for this endpoint. A list of |
|
The incoming fault interceptors for this endpoint. A list of |
|
The outgoing interceptors for this endpoint. A list of |
|
The outgoing fault interceptors for this endpoint. A list of |
|
A properties map which should be supplied to the JAX-WS endpoint. See below. |
|
A JAX-WS handler list which should be supplied to the JAX-WS endpoint. See below. |
|
You can specify the which |
|
You can specify the |
|
The features that hold the interceptors for this endpoint. A list of beans or refs |
|
The schema locations for endpoint to use. A list of schemaLocations |
|
The service factory for this endpoint to use. This can be supplied using
the Spring |
You can find more advanced examples that show how to provide interceptors, properties and handlers on the CXF JAX-WS Configuration page.
You can use cxf:properties to set the camel-cxf endpoint’s dataFormat and setDefaultBus properties from spring configuration file.
|
Configuring the CXF Endpoints with Apache Aries Blueprint
The component is capable of utilizing aries blueprint dependency injection for your CXF endpoints. The schema utilized is very similar to the spring schema so the transition is fairly transparent.
Example
<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:camel-cxf="http://camel.apache.org/schema/blueprint/cxf"
xsi:schemaLocation="http://www.osgi.org/xmlns/blueprint/v1.0.0 http://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd">
<camel-cxf:cxfEndpoint id="routerEndpoint"
address="http://localhost:9001/router"
serviceClass="org.apache.servicemix.examples.cxf.HelloWorld">
<camel-cxf:properties>
<entry key="dataFormat" value="RAW"/>
</camel-cxf:properties>
</camel-cxf:cxfEndpoint>
<camel-cxf:cxfEndpoint id="serviceEndpoint"
address="http://localhost:9000/SoapContext/SoapPort"
serviceClass="org.apache.servicemix.examples.cxf.HelloWorld">
</camel-cxf:cxfEndpoint>
<camelContext xmlns="http://camel.apache.org/schema/blueprint">
<route>
<from uri="routerEndpoint"/>
<to uri="log:request"/>
</route>
</camelContext>
</blueprint>
Currently the endpoint element is the first supported CXF namespacehandler.
You can also use the bean references just as in spring
<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:cm="http://aries.apache.org/blueprint/xmlns/blueprint-cm/v1.0.0"
xmlns:jaxws="http://cxf.apache.org/blueprint/jaxws"
xmlns:cxf="http://cxf.apache.org/blueprint/core"
xmlns:camel="http://camel.apache.org/schema/blueprint"
xmlns:camelcxf="http://camel.apache.org/schema/blueprint/cxf"
xsi:schemaLocation="
http://www.osgi.org/xmlns/blueprint/v1.0.0 http://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd
http://cxf.apache.org/blueprint/jaxws http://cxf.apache.org/schemas/blueprint/jaxws.xsd
http://cxf.apache.org/blueprint/core http://cxf.apache.org/schemas/blueprint/core.xsd
">
<camelcxf:cxfEndpoint id="reportIncident"
address="/camel-example-cxf-blueprint/webservices/incident"
wsdlURL="META-INF/wsdl/report_incident.wsdl"
serviceClass="org.apache.camel.example.reportincident.ReportIncidentEndpoint">
</camelcxf:cxfEndpoint>
<bean id="reportIncidentRoutes" class="org.apache.camel.example.reportincident.ReportIncidentRoutes" />
<camelContext xmlns="http://camel.apache.org/schema/blueprint">
<routeBuilder ref="reportIncidentRoutes"/>
</camelContext>
</blueprint>
How to make the camel-cxf component use log4j instead of java.util.logging
CXF’s default logger is java.util.logging
. If you want to change it to
log4j, proceed as follows. Create a file, in the classpath, named
META-INF/cxf/org.apache.cxf.logger
. This file should contain the
fully-qualified name of the class,
org.apache.cxf.common.logging.Log4jLogger
, with no comments, on a
single line.
How to let camel-cxf response start with xml processing instruction
If you are using some SOAP client such as PHP, you will get this kind of
error, because CXF doesn’t add the XML processing instruction
<?xml version="1.0" encoding="utf-8"?>
:
Error:sendSms: SoapFault exception: [Client] looks like we got no XML document in [...]
To resolve this issue, you just need to tell StaxOutInterceptor to write the XML start document for you, as in the WriteXmlDeclarationInterceptor below:
public class WriteXmlDeclarationInterceptor extends AbstractPhaseInterceptor<SoapMessage> {
public WriteXmlDeclarationInterceptor() {
super(Phase.PRE_STREAM);
addBefore(StaxOutInterceptor.class.getName());
}
public void handleMessage(SoapMessage message) throws Fault {
message.put("org.apache.cxf.stax.force-start-document", Boolean.TRUE);
}
}
As an alternative you can add a message header for it as demonstrated in CxfConsumerTest:
// set up the response context which force start document
Map<String, Object> map = new HashMap<String, Object>();
map.put("org.apache.cxf.stax.force-start-document", Boolean.TRUE);
exchange.getOut().setHeader(Client.RESPONSE_CONTEXT, map);
How to override the CXF producer address from message header
The camel-cxf
producer supports to override the target service address by
setting a message header CamelDestinationOverrideUrl
.
// set up the service address from the message header to override the setting of CXF endpoint
exchange.getIn().setHeader(Exchange.DESTINATION_OVERRIDE_URL, constant(getServiceAddress()));
How to consume a message from a camel-cxf endpoint in POJO data format
The camel-cxf
endpoint consumer POJO data format is based on the
CXF invoker, so the
message header has a property with the name of
CxfConstants.OPERATION_NAME
and the message body is a list of the SEI
method parameters.
Consider the PersonProcessor example code:
public class PersonProcessor implements Processor {
private static final Logger LOG = LoggerFactory.getLogger(PersonProcessor.class);
@Override
@SuppressWarnings("unchecked")
public void process(Exchange exchange) throws Exception {
LOG.info("processing exchange in camel");
BindingOperationInfo boi = (BindingOperationInfo) exchange.getProperty(BindingOperationInfo.class.getName());
if (boi != null) {
LOG.info("boi.isUnwrapped" + boi.isUnwrapped());
}
// Get the parameters list which element is the holder.
MessageContentsList msgList = (MessageContentsList) exchange.getIn().getBody();
Holder<String> personId = (Holder<String>) msgList.get(0);
Holder<String> ssn = (Holder<String>) msgList.get(1);
Holder<String> name = (Holder<String>) msgList.get(2);
if (personId.value == null || personId.value.length() == 0) {
LOG.info("person id 123, so throwing exception");
// Try to throw out the soap fault message
org.apache.camel.wsdl_first.types.UnknownPersonFault personFault
= new org.apache.camel.wsdl_first.types.UnknownPersonFault();
personFault.setPersonId("");
org.apache.camel.wsdl_first.UnknownPersonFault fault
= new org.apache.camel.wsdl_first.UnknownPersonFault("Get the null value of person name", personFault);
exchange.getMessage().setBody(fault);
return;
}
name.value = "Bonjour";
ssn.value = "123";
LOG.info("setting Bonjour as the response");
// Set the response message, first element is the return value of the operation,
// the others are the holders of method parameters
exchange.getMessage().setBody(new Object[] { null, personId, ssn, name });
}
}
How to prepare the message for the camel-cxf endpoint in POJO data format
The camel-cxf
endpoint producer is based on the
CXF
client API. First you need to specify the operation name in the message
header, then add the method parameters to a list, and initialize the
message with this parameter list. The response message’s body is a
messageContentsList, you can get the result from that list.
If you don’t specify the operation name in the message header,
CxfProducer
will try to use the defaultOperationName
from
CxfEndpoint
, if there is no defaultOperationName
set on
CxfEndpoint
, it will pick up the first operationName from the Operation
list.
If you want to get the object array from the message body, you can get
the body using message.getBody(Object[].class)
, as shown in CxfProducerRouterTest.testInvokingSimpleServerWithParams:
Exchange senderExchange = new DefaultExchange(context, ExchangePattern.InOut);
final List<String> params = new ArrayList<>();
// Prepare the request message for the camel-cxf procedure
params.add(TEST_MESSAGE);
senderExchange.getIn().setBody(params);
senderExchange.getIn().setHeader(CxfConstants.OPERATION_NAME, ECHO_OPERATION);
Exchange exchange = template.send("direct:EndpointA", senderExchange);
org.apache.camel.Message out = exchange.getMessage();
// The response message's body is an MessageContentsList which first element is the return value of the operation,
// If there are some holder parameters, the holder parameter will be filled in the reset of List.
// The result will be extract from the MessageContentsList with the String class type
MessageContentsList result = (MessageContentsList) out.getBody();
LOG.info("Received output text: " + result.get(0));
Map<String, Object> responseContext = CastUtils.cast((Map<?, ?>) out.getHeader(Client.RESPONSE_CONTEXT));
assertNotNull(responseContext);
assertEquals("UTF-8", responseContext.get(org.apache.cxf.message.Message.ENCODING),
"We should get the response context here");
assertEquals("echo " + TEST_MESSAGE, result.get(0), "Reply body on Camel is wrong");
How to deal with the message for a camel-cxf endpoint in PAYLOAD data format
PAYLOAD
means that you process the payload from the SOAP
envelope as a native CxfPayload. Message.getBody()
will return a
org.apache.camel.component.cxf.CxfPayload
object, with getters
for SOAP message headers and the SOAP body.
protected RouteBuilder createRouteBuilder() {
return new RouteBuilder() {
public void configure() {
from(simpleEndpointURI + "&dataFormat=PAYLOAD").to("log:info").process(new Processor() {
@SuppressWarnings("unchecked")
public void process(final Exchange exchange) throws Exception {
CxfPayload<SoapHeader> requestPayload = exchange.getIn().getBody(CxfPayload.class);
List<Source> inElements = requestPayload.getBodySources();
List<Source> outElements = new ArrayList<>();
// You can use a customer toStringConverter to turn a CxfPayLoad message into String as you want
String request = exchange.getIn().getBody(String.class);
XmlConverter converter = new XmlConverter();
String documentString = ECHO_RESPONSE;
Element in = new XmlConverter().toDOMElement(inElements.get(0));
// Just check the element namespace
if (!in.getNamespaceURI().equals(ELEMENT_NAMESPACE)) {
throw new IllegalArgumentException("Wrong element namespace");
}
if (in.getLocalName().equals("echoBoolean")) {
documentString = ECHO_BOOLEAN_RESPONSE;
checkRequest("ECHO_BOOLEAN_REQUEST", request);
} else {
documentString = ECHO_RESPONSE;
checkRequest("ECHO_REQUEST", request);
}
Document outDocument = converter.toDOMDocument(documentString, exchange);
outElements.add(new DOMSource(outDocument.getDocumentElement()));
// set the payload header with null
CxfPayload<SoapHeader> responsePayload = new CxfPayload<>(null, outElements, null);
exchange.getMessage().setBody(responsePayload);
}
});
}
};
}
How to get and set SOAP headers in POJO mode
POJO
means that the data format is a "list of Java objects" when the
camel-cxf endpoint produces or consumes Camel exchanges. Even though
Camel exposes the message body as POJOs in this mode, camel-cxf still
provides access to read and write SOAP headers. However, since CXF
interceptors remove in-band SOAP headers from the header list after they
have been processed, only out-of-band SOAP headers are available to
camel-cxf in POJO mode.
The following example illustrates how to get/set SOAP headers. Suppose we have a route that forwards from one Camel-cxf endpoint to another. That is, SOAP Client → Camel → CXF service. We can attach two processors to obtain/insert SOAP headers at (1) before a request goes out to the CXF service and (2) before the response comes back to the SOAP Client. Processor (1) and (2) in this example are InsertRequestOutHeaderProcessor and InsertResponseOutHeaderProcessor. Our route looks like this:
<route>
<from uri="cxf:bean:routerRelayEndpointWithInsertion"/>
<process ref="InsertRequestOutHeaderProcessor" />
<to uri="cxf:bean:serviceRelayEndpointWithInsertion"/>
<process ref="InsertResponseOutHeaderProcessor" />
</route>
SOAP headers are propagated to and from Camel Message headers. The Camel message header name is "org.apache.cxf.headers.Header.list" which is a constant defined in CXF (org.apache.cxf.headers.Header.HEADER_LIST). The header value is a List of CXF SoapHeader objects (org.apache.cxf.binding.soap.SoapHeader). The following snippet is the InsertResponseOutHeaderProcessor (that insert a new SOAP header in the response message). The way to access SOAP headers in both InsertResponseOutHeaderProcessor and InsertRequestOutHeaderProcessor are actually the same. The only difference between the two processors is setting the direction of the inserted SOAP header.
You can find the InsertResponseOutHeaderProcessor
example in CxfMessageHeadersRelayTest:
public static class InsertResponseOutHeaderProcessor implements Processor {
public void process(Exchange exchange) throws Exception {
List<SoapHeader> soapHeaders = CastUtils.cast((List<?>)exchange.getIn().getHeader(Header.HEADER_LIST));
// Insert a new header
String xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?><outofbandHeader "
+ "xmlns=\"http://cxf.apache.org/outofband/Header\" hdrAttribute=\"testHdrAttribute\" "
+ "xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\" soap:mustUnderstand=\"1\">"
+ "<name>New_testOobHeader</name><value>New_testOobHeaderValue</value></outofbandHeader>";
SoapHeader newHeader = new SoapHeader(soapHeaders.get(0).getName(),
DOMUtils.readXml(new StringReader(xml)).getDocumentElement());
// make sure direction is OUT since it is a response message.
newHeader.setDirection(Direction.DIRECTION_OUT);
//newHeader.setMustUnderstand(false);
soapHeaders.add(newHeader);
}
}
How to get and set SOAP headers in PAYLOAD mode
We’ve already shown how to access the SOAP message as CxfPayload object in PAYLOAD mode inm the section How to deal with the message for a camel-cxf endpoint in PAYLOAD data format.
Once you obtain a CxfPayload object, you can invoke the CxfPayload.getHeaders() method that returns a List of DOM Elements (SOAP headers).
For an example see CxfPayLoadSoapHeaderTest:
from(getRouterEndpointURI()).process(new Processor() {
@SuppressWarnings("unchecked")
public void process(Exchange exchange) throws Exception {
CxfPayload<SoapHeader> payload = exchange.getIn().getBody(CxfPayload.class);
List<Source> elements = payload.getBodySources();
assertNotNull(elements, "We should get the elements here");
assertEquals(1, elements.size(), "Get the wrong elements size");
Element el = new XmlConverter().toDOMElement(elements.get(0));
elements.set(0, new DOMSource(el));
assertEquals("http://camel.apache.org/pizza/types",
el.getNamespaceURI(), "Get the wrong namespace URI");
List<SoapHeader> headers = payload.getHeaders();
assertNotNull(headers, "We should get the headers here");
assertEquals(1, headers.size(), "Get the wrong headers size");
assertEquals("http://camel.apache.org/pizza/types",
((Element) (headers.get(0).getObject())).getNamespaceURI(), "Get the wrong namespace URI");
// alternatively you can also get the SOAP header via the camel header:
headers = exchange.getIn().getHeader(Header.HEADER_LIST, List.class);
assertNotNull(headers, "We should get the headers here");
assertEquals(1, headers.size(), "Get the wrong headers size");
assertEquals("http://camel.apache.org/pizza/types",
((Element) (headers.get(0).getObject())).getNamespaceURI(), "Get the wrong namespace URI");
}
})
.to(getServiceEndpointURI());
You can also use the same way as described in sub-chapter "How to get and set SOAP headers in POJO mode" to set or get the SOAP headers. So, you can use the header "org.apache.cxf.headers.Header.list" to get and set a list of SOAP headers.This does also mean that if you have a route that forwards from one Camel-cxf endpoint to another (SOAP Client → Camel → CXF service), now also the SOAP headers sent by the SOAP client are forwarded to the CXF service. If you do not want that these headers are forwarded you have to remove them in the Camel header "org.apache.cxf.headers.Header.list".
SOAP headers are not available in MESSAGE mode
SOAP headers are not available in MESSAGE mode as SOAP processing is skipped.
How to throw a SOAP Fault from Camel
If you are using a camel-cxf
endpoint to consume the SOAP request, you
may need to throw the SOAP Fault from the camel context.
Basically, you can use the throwFault
DSL to do that; it works for
POJO
, PAYLOAD
and MESSAGE
data format.
You can define the soap fault as shown in CxfCustomizedExceptionTest:
SOAP_FAULT = new SoapFault(EXCEPTION_MESSAGE, SoapFault.FAULT_CODE_CLIENT);
Element detail = SOAP_FAULT.getOrCreateDetail();
Document doc = detail.getOwnerDocument();
Text tn = doc.createTextNode(DETAIL_TEXT);
detail.appendChild(tn);
Then throw it as you like
from(routerEndpointURI).setFaultBody(constant(SOAP_FAULT));
If your CXF endpoint is working in the MESSAGE
data format, you could
set the SOAP Fault message in the message body and set the response
code in the message header as demonstrated by CxfMessageStreamExceptionTest
from(routerEndpointURI).process(new Processor() {
public void process(Exchange exchange) throws Exception {
Message out = exchange.getOut();
// Set the message body with the
out.setBody(this.getClass().getResourceAsStream("SoapFaultMessage.xml"));
// Set the response code here
out.setHeader(org.apache.cxf.message.Message.RESPONSE_CODE, new Integer(500));
}
});
Same for using POJO data format. You can set the SOAPFault on the out body.
How to propagate a camel-cxf endpoint’s request and response context
CXF
client API provides a way to invoke the operation with request and
response context. If you are using a camel-cxf
endpoint producer to
invoke the outside web service, you can set the request context and get
response context with the following code:
CxfExchange exchange = (CxfExchange)template.send(getJaxwsEndpointUri(), new Processor() {
public void process(final Exchange exchange) {
final List<String> params = new ArrayList<String>();
params.add(TEST_MESSAGE);
// Set the request context to the inMessage
Map<String, Object> requestContext = new HashMap<String, Object>();
requestContext.put(BindingProvider.ENDPOINT_ADDRESS_PROPERTY, JAXWS_SERVER_ADDRESS);
exchange.getIn().setBody(params);
exchange.getIn().setHeader(Client.REQUEST_CONTEXT , requestContext);
exchange.getIn().setHeader(CxfConstants.OPERATION_NAME, GREET_ME_OPERATION);
}
});
org.apache.camel.Message out = exchange.getOut();
// The output is an object array, the first element of the array is the return value
Object\[\] output = out.getBody(Object\[\].class);
LOG.info("Received output text: " + output\[0\]);
// Get the response context form outMessage
Map<String, Object> responseContext = CastUtils.cast((Map)out.getHeader(Client.RESPONSE_CONTEXT));
assertNotNull(responseContext);
assertEquals("Get the wrong wsdl operation name", "{http://apache.org/hello_world_soap_http}greetMe",
responseContext.get("javax.xml.ws.wsdl.operation").toString());
Attachment Support
POJO Mode: Both SOAP with Attachment and MTOM are supported (see example in Payload Mode for enabling MTOM). However, SOAP with Attachment is not tested. Since attachments are marshalled and unmarshalled into POJOs, users typically do not need to deal with the attachment themself. Attachments are propagated to Camel message’s attachments if the MTOM is not enabled. So, it is possible to retrieve attachments by Camel Message API
DataHandler Message.getAttachment(String id)
Payload Mode: MTOM is supported by the component. Attachments can be retrieved by Camel Message APIs mentioned above. SOAP with Attachment (SwA) is supported and attachments can be retrieved. SwA is the default (same as setting the CXF endpoint property "mtom-enabled" to false).
To enable MTOM, set the CXF endpoint property "mtom-enabled" to true. (I believe you can only do it with Spring.)
<cxf:cxfEndpoint id="routerEndpoint" address="http://localhost:${CXFTestSupport.port1}/CxfMtomRouterPayloadModeTest/jaxws-mtom/hello"
wsdlURL="mtom.wsdl"
serviceName="ns:HelloService"
endpointName="ns:HelloPort"
xmlns:ns="http://apache.org/camel/cxf/mtom_feature">
<cxf:properties>
<!-- enable mtom by setting this property to true -->
<entry key="mtom-enabled" value="true"/>
<!-- set the camel-cxf endpoint data fromat to PAYLOAD mode -->
<entry key="dataFormat" value="PAYLOAD"/>
</cxf:properties>
</cxf:cxfEndpoint>
You can produce a Camel message with attachment to send to a CXF endpoint in Payload mode.
Exchange exchange = context.createProducerTemplate().send("direct:testEndpoint", new Processor() {
public void process(Exchange exchange) throws Exception {
exchange.setPattern(ExchangePattern.InOut);
List<Source> elements = new ArrayList<Source>();
elements.add(new DOMSource(DOMUtils.readXml(new StringReader(MtomTestHelper.REQ_MESSAGE)).getDocumentElement()));
CxfPayload<SoapHeader> body = new CxfPayload<SoapHeader>(new ArrayList<SoapHeader>(),
elements, null);
exchange.getIn().setBody(body);
exchange.getIn().addAttachment(MtomTestHelper.REQ_PHOTO_CID,
new DataHandler(new ByteArrayDataSource(MtomTestHelper.REQ_PHOTO_DATA, "application/octet-stream")));
exchange.getIn().addAttachment(MtomTestHelper.REQ_IMAGE_CID,
new DataHandler(new ByteArrayDataSource(MtomTestHelper.requestJpeg, "image/jpeg")));
}
});
// process response
CxfPayload<SoapHeader> out = exchange.getOut().getBody(CxfPayload.class);
Assert.assertEquals(1, out.getBody().size());
Map<String, String> ns = new HashMap<String, String>();
ns.put("ns", MtomTestHelper.SERVICE_TYPES_NS);
ns.put("xop", MtomTestHelper.XOP_NS);
XPathUtils xu = new XPathUtils(ns);
Element oute = new XmlConverter().toDOMElement(out.getBody().get(0));
Element ele = (Element)xu.getValue("//ns:DetailResponse/ns:photo/xop:Include", oute,
XPathConstants.NODE);
String photoId = ele.getAttribute("href").substring(4); // skip "cid:"
ele = (Element)xu.getValue("//ns:DetailResponse/ns:image/xop:Include", oute,
XPathConstants.NODE);
String imageId = ele.getAttribute("href").substring(4); // skip "cid:"
DataHandler dr = exchange.getOut().getAttachment(photoId);
Assert.assertEquals("application/octet-stream", dr.getContentType());
MtomTestHelper.assertEquals(MtomTestHelper.RESP_PHOTO_DATA, IOUtils.readBytesFromStream(dr.getInputStream()));
dr = exchange.getOut().getAttachment(imageId);
Assert.assertEquals("image/jpeg", dr.getContentType());
BufferedImage image = ImageIO.read(dr.getInputStream());
Assert.assertEquals(560, image.getWidth());
Assert.assertEquals(300, image.getHeight());
You can also consume a Camel message received from a CXF endpoint in Payload mode. The CxfMtomConsumerPayloadModeTest illustrates how this works:
public static class MyProcessor implements Processor {
@SuppressWarnings("unchecked")
public void process(Exchange exchange) throws Exception {
CxfPayload<SoapHeader> in = exchange.getIn().getBody(CxfPayload.class);
// verify request
Assert.assertEquals(1, in.getBody().size());
Map<String, String> ns = new HashMap<String, String>();
ns.put("ns", MtomTestHelper.SERVICE_TYPES_NS);
ns.put("xop", MtomTestHelper.XOP_NS);
XPathUtils xu = new XPathUtils(ns);
Element body = new XmlConverter().toDOMElement(in.getBody().get(0));
Element ele = (Element)xu.getValue("//ns:Detail/ns:photo/xop:Include", body,
XPathConstants.NODE);
String photoId = ele.getAttribute("href").substring(4); // skip "cid:"
Assert.assertEquals(MtomTestHelper.REQ_PHOTO_CID, photoId);
ele = (Element)xu.getValue("//ns:Detail/ns:image/xop:Include", body,
XPathConstants.NODE);
String imageId = ele.getAttribute("href").substring(4); // skip "cid:"
Assert.assertEquals(MtomTestHelper.REQ_IMAGE_CID, imageId);
DataHandler dr = exchange.getIn().getAttachment(photoId);
Assert.assertEquals("application/octet-stream", dr.getContentType());
MtomTestHelper.assertEquals(MtomTestHelper.REQ_PHOTO_DATA, IOUtils.readBytesFromStream(dr.getInputStream()));
dr = exchange.getIn().getAttachment(imageId);
Assert.assertEquals("image/jpeg", dr.getContentType());
MtomTestHelper.assertEquals(MtomTestHelper.requestJpeg, IOUtils.readBytesFromStream(dr.getInputStream()));
// create response
List<Source> elements = new ArrayList<Source>();
elements.add(new DOMSource(DOMUtils.readXml(new StringReader(MtomTestHelper.RESP_MESSAGE)).getDocumentElement()));
CxfPayload<SoapHeader> sbody = new CxfPayload<SoapHeader>(new ArrayList<SoapHeader>(),
elements, null);
exchange.getOut().setBody(sbody);
exchange.getOut().addAttachment(MtomTestHelper.RESP_PHOTO_CID,
new DataHandler(new ByteArrayDataSource(MtomTestHelper.RESP_PHOTO_DATA, "application/octet-stream")));
exchange.getOut().addAttachment(MtomTestHelper.RESP_IMAGE_CID,
new DataHandler(new ByteArrayDataSource(MtomTestHelper.responseJpeg, "image/jpeg")));
}
}
Message Mode: Attachments are not supported as it does not process the message at all.
CXF_MESSAGE Mode: MTOM is supported, and Attachments can be retrieved by Camel Message APIs mentioned above. Note that when receiving a multipart (i.e. MTOM) message the default SOAPMessage to String converter will provide the complete multipart payload on the body. If you require just the SOAP XML as a String, you can set the message body with message.getSOAPPart(), and Camel convert can do the rest of work for you.
Streaming Support in PAYLOAD mode
The camel-cxf component now supports streaming of incoming messages when using PAYLOAD mode. Previously, the incoming messages would have been completely DOM parsed. For large messages, this is time consuming and uses a significant amount of memory. The incoming messages can remain as a javax.xml.transform.Source while being routed and, if nothing modifies the payload, can then be directly streamed out to the target destination. For common "simple proxy" use cases (example: from("cxf:…").to("cxf:…")), this can provide very significant performance increases as well as significantly lowered memory requirements.
However, there are cases where streaming may not be appropriate or desired. Due to the streaming nature, invalid incoming XML may not be caught until later in the processing chain. Also, certain actions may require the message to be DOM parsed anyway (like WS-Security or message tracing and such) in which case the advantages of the streaming is limited. At this point, there are two ways to control the streaming:
-
Endpoint property: you can add "allowStreaming=false" as an endpoint property to turn the streaming on/off.
-
Component property: the CxfComponent object also has an allowStreaming property that can set the default for endpoints created from that component.
Global system property: you can add a system property of "org.apache.camel.component.cxf.streaming" to "false" to turn it off. That sets the global default, but setting the endpoint property above will override this value for that endpoint.
Using the generic CXF Dispatch mode
The camel-cxf component supports the generic CXF dispatch mode that can transport messages of arbitrary structures (i.e., not bound to a specific XML schema). To use this mode, you simply omit specifying the wsdlURL and serviceClass attributes of the CXF endpoint.
<cxf:cxfEndpoint id="testEndpoint" address="http://localhost:9000/SoapContext/SoapAnyPort">
<cxf:properties>
<entry key="dataFormat" value="PAYLOAD"/>
</cxf:properties>
</cxf:cxfEndpoint>
It is noted that the default CXF dispatch client does not send a specific SOAPAction header. Therefore, when the target service requires a specific SOAPAction value, it is supplied in the Camel header using the key SOAPAction (case-insensitive).
Spring Boot Auto-Configuration
When using cxf with Spring Boot make sure to use the following Maven dependency to have support for auto configuration:
<dependency>
<groupId>org.apache.camel.springboot</groupId>
<artifactId>camel-cxf-soap-starter</artifactId>
<version>x.x.x</version>
<!-- use the same version as your Camel core version -->
</dependency>
The component supports 7 options, which are listed below.
Name | Description | Default | Type |
---|---|---|---|
This option controls whether the CXF component, when running in PAYLOAD mode, will DOM parse the incoming messages into DOM Elements or keep the payload as a javax.xml.transform.Source object that would allow streaming in some cases. |
Boolean |
||
Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc. |
true |
Boolean |
|
Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored. |
false |
Boolean |
|
Whether to enable auto configuration of the cxf component. This is enabled by default. |
Boolean |
||
To use a custom org.apache.camel.spi.HeaderFilterStrategy to filter header to and from Camel message. The option is a org.apache.camel.spi.HeaderFilterStrategy type. |
HeaderFilterStrategy |
||
Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing. |
false |
Boolean |
|
Enable usage of global SSL context parameters. |
false |
Boolean |