Thrift
Since Camel 2.20
Both producer and consumer are supported
The Thrift component allows you to call or expose Remote Procedure Call (RPC) services using Apache Thrift binary communication protocol and serialization mechanism.
Maven users will need to add the following dependency to their pom.xml
for this component:
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-thrift</artifactId>
<version>x.x.x</version>
<!-- use the same version as your Camel core version -->
</dependency>
Endpoint Options
The Thrift component supports 4 options, which are listed below.
Name | Description | Default | Type |
---|---|---|---|
bridgeErrorHandler (consumer) |
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 |
lazyStartProducer (producer) |
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 |
autowiredEnabled (advanced) |
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 |
useGlobalSslContextParameters (security) |
Determine if the thrift component is using global SSL context parameters |
false |
boolean |
The Thrift endpoint is configured using URI syntax:
thrift:host:port/service
with the following path and query parameters:
Path Parameters (3 parameters):
Name | Description | Default | Type |
---|---|---|---|
host |
The Thrift server host name. This is localhost or 0.0.0.0 (if not defined) when being a consumer or remote server host name when using producer. |
String |
|
port |
Required The Thrift server port |
int |
|
service |
Required Fully qualified service name from the thrift descriptor file (package dot service definition name) |
String |
Query Parameters (13 parameters):
Name | Description | Default | Type |
---|---|---|---|
compressionType (common) |
Protocol compression mechanism type. There are 2 enums and the value can be one of: NONE, ZLIB |
NONE |
ThriftCompressionType |
exchangeProtocol (common) |
Exchange protocol serialization type. There are 4 enums and the value can be one of: BINARY, JSON, SJSON, COMPACT |
BINARY |
ThriftExchangeProtocol |
bridgeErrorHandler (consumer) |
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 |
clientTimeout (consumer) |
Client timeout for consumers |
int |
|
maxPoolSize (consumer) |
The Thrift server consumer max thread pool size |
10 |
int |
poolSize (consumer) |
The Thrift server consumer initial thread pool size |
1 |
int |
exceptionHandler (consumer) |
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 |
|
exchangePattern (consumer) |
Sets the exchange pattern when the consumer creates an exchange. There are 3 enums and the value can be one of: InOnly, InOut, InOptionalOut |
ExchangePattern |
|
lazyStartProducer (producer) |
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 |
method (producer) |
The Thrift invoked method name |
String |
|
synchronous (advanced) |
Sets whether synchronous processing should be strictly used |
false |
boolean |
negotiationType (security) |
Security negotiation type. There are 3 enums and the value can be one of: PLAINTEXT, SSL, SASL |
PLAINTEXT |
ThriftNegotiationType |
sslParameters (security) |
Configuration parameters for SSL/TLS security negotiation |
SSLContextParameters |
Thrift method parameters mapping
Parameters in the called procedure must be passed as a list of objects inside the message body. The primitives are converted from the objects on the fly. In order to correctly find the corresponding method, all types must be transmitted regardless of the values. Please see an exmaple below, how to pass different parameters to the method with the Camel body
List requestBody = new ArrayList();
requestBody.add((boolean)true);
requestBody.add((byte)THRIFT_TEST_NUM1);
requestBody.add((short)THRIFT_TEST_NUM1);
requestBody.add((int)THRIFT_TEST_NUM1);
requestBody.add((long)THRIFT_TEST_NUM1);
requestBody.add((double)THRIFT_TEST_NUM1);
requestBody.add("empty"); // String parameter
requestBody.add(ByteBuffer.allocate(10)); // binary parameter
requestBody.add(new Work(THRIFT_TEST_NUM1, THRIFT_TEST_NUM2, Operation.MULTIPLY)); // Struct parameter
requestBody.add(new ArrayList<Integer>()); // list paramater
requestBody.add(new HashSet<String>()); // set parameter
requestBody.add(new HashMap<String, Long>()); // map parameter
Object responseBody = template.requestBody("direct:thrift-alltypes", requestBody);
Incoming parameters in the service consumer will also be passed to the message body as a list of objects.
Thrift consumer headers (will be installed after the consumer invocation)
Header name | Description | Possible values |
---|---|---|
CamelThriftMethodName |
Method name handled by the consumer service |
Examples
Below is a simple synchronous method invoke with host and port parameters
from("direct:thrift-calculate")
.to("thrift://localhost:1101/org.apache.camel.component.thrift.generated.Calculator?method=calculate&synchronous=true");
Below is a simple synchronous method invoke for the XML DSL configuration
<route>
<from uri="direct:thrift-add" />
<to uri="thrift://localhost:1101/org.apache.camel.component.thrift.generated.Calculator?method=add&synchronous=true"/>
</route>
Thrift service consumer with asynchronous communication
from("thrift://localhost:1101/org.apache.camel.component.thrift.generated.Calculator")
.to("direct:thrift-service");
It’s possible to automate Java code generation for .thrift files using thrift-maven-plugin, but before start the thrift compiler binary distribution for your operating system must be present on the running host.
For more information, see these resources
Thrift project GitHub https://thrift.apache.org/tutorial/java [Apache Thrift Java tutorial]
Spring Boot Auto-Configuration
When using thrift 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-thrift-starter</artifactId>
<version>x.x.x</version>
<!-- use the same version as your Camel core version -->
</dependency>
The component supports 9 options, which are listed below.
Name | Description | Default | Type |
---|---|---|---|
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 thrift component. This is enabled by default. |
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 |
|
Determine if the thrift component is using global SSL context parameters. |
false |
Boolean |
|
Defines a content type format in which thrift message will be serialized/deserialized from(to) the Java been. The format can either be native or json for either native binary thrift, json or simple json fields representation. The default value is binary. |
binary |
String |
|
Whether the data format should set the Content-Type header with the type from the data format. For example application/xml for data formats marshalling to XML, or application/json for data formats marshalling to JSON. |
true |
Boolean |
|
Whether to enable auto configuration of the thrift data format. This is enabled by default. |
Boolean |
||
Name of class to use when unmarshalling. |
String |