com.rabbitmq.tools.jsonrpc
Class JsonRpcServer

java.lang.Object
  com.rabbitmq.client.RpcServer
      com.rabbitmq.client.StringRpcServer
          com.rabbitmq.tools.jsonrpc.JsonRpcServer

public class JsonRpcServer
extends StringRpcServer

JSON-RPC Server class. Given a Java Class, representing an interface, and an implementation of that interface, JsonRpcServer will reflect on the class to construct the ServiceDescription, and will route incoming requests for methods on the interface to the implementation object while the mainloop() is running.

See Also:

RpcServer, JsonRpcClient

Field Summary

java.lang.Class<?>	interfaceClass The interface this server implements.
java.lang.Object	interfaceInstance The instance backing this server.
ServiceDescription	serviceDescription Holds the JSON-RPC service description for this client.

Fields inherited from class com.rabbitmq.client.StringRpcServer

STRING_ENCODING

Constructor Summary

JsonRpcServer(Channel channel, java.lang.Class<?> interfaceClass, java.lang.Object interfaceInstance)
Construct a server that talks to the outside world using the given channel, and constructs a fresh temporary queue.

JsonRpcServer(Channel channel, java.lang.String queueName, java.lang.Class<?> interfaceClass, java.lang.Object interfaceInstance)
Construct a server that talks to the outside world using the given channel and queue name.

Method Summary

java.lang.String	doCall(java.lang.String requestBody) Runs a single JSON-RPC request.
static java.lang.String	errorResponse(java.lang.Object id, int code, java.lang.String message, java.lang.Object errorArg) Construct and encode a JSON-RPC error response for the request ID given, using the code, message, and possible (JSON-encodable) argument passed in.
ServiceDescription	getServiceDescription() Public API - gets the service description record that this service built from interfaceClass at construction time.
java.lang.String	handleStringCall(java.lang.String requestBody, AMQP.BasicProperties replyProperties) Override our superclass' method, dispatching to doCall.
java.lang.reflect.Method	matchingMethod(java.lang.String methodName, java.lang.Object[] params) Retrieves the best matching method for the given method name and parameters.
static java.lang.String	response(java.lang.Object id, java.lang.String label, java.lang.Object value) Private API - used by errorResponse and resultResponse.
static java.lang.String	resultResponse(java.lang.Object id, java.lang.Object result) Construct and encode a JSON-RPC success response for the request ID given, using the result value passed in.

Methods inherited from class com.rabbitmq.client.StringRpcServer

handleCall, handleCast, handleStringCall, handleStringCast

Methods inherited from class com.rabbitmq.client.RpcServer

close, getChannel, getQueueName, handleCall, handleCall, handleCast, handleCast, mainloop, processRequest, setupConsumer, terminateMainloop

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

serviceDescription

public ServiceDescription serviceDescription

Holds the JSON-RPC service description for this client.

interfaceClass

public java.lang.Class<?> interfaceClass

The interface this server implements.

interfaceInstance

public java.lang.Object interfaceInstance

The instance backing this server.

Constructor Detail

JsonRpcServer

public JsonRpcServer(Channel channel,
                     java.lang.Class<?> interfaceClass,
                     java.lang.Object interfaceInstance)
              throws java.io.IOException

Construct a server that talks to the outside world using the given channel, and constructs a fresh temporary queue. Use getQueueName() to discover the created queue name.

Parameters:

channel - AMQP channel to use

interfaceClass - Java interface that this server is exposing to the world

interfaceInstance - Java instance (of interfaceClass) that is being exposed

Throws:

java.io.IOException - if something goes wrong during an AMQP operation

JsonRpcServer

public JsonRpcServer(Channel channel,
                     java.lang.String queueName,
                     java.lang.Class<?> interfaceClass,
                     java.lang.Object interfaceInstance)
              throws java.io.IOException

Construct a server that talks to the outside world using the given channel and queue name. Our superclass, RpcServer, expects the queue to exist at the time of construction.

Parameters:

channel - AMQP channel to use

queueName - AMQP queue name to listen for requests on

interfaceClass - Java interface that this server is exposing to the world

interfaceInstance - Java instance (of interfaceClass) that is being exposed

Throws:

java.io.IOException - if something goes wrong during an AMQP operation

Method Detail

handleStringCall

public java.lang.String handleStringCall(java.lang.String requestBody,
                                         AMQP.BasicProperties replyProperties)

Override our superclass' method, dispatching to doCall.

Overrides:

handleStringCall in class StringRpcServer

doCall

public java.lang.String doCall(java.lang.String requestBody)

Runs a single JSON-RPC request.

Parameters:

requestBody - the JSON-RPC request string (a JSON encoded value)

Returns:

a JSON-RPC response string (a JSON encoded value)

matchingMethod

public java.lang.reflect.Method matchingMethod(java.lang.String methodName,
                                               java.lang.Object[] params)

Retrieves the best matching method for the given method name and parameters. Subclasses may override this if they have specialised dispatching requirements, so long as they continue to honour their ServiceDescription.

errorResponse

public static java.lang.String errorResponse(java.lang.Object id,
                                             int code,
                                             java.lang.String message,
                                             java.lang.Object errorArg)

Construct and encode a JSON-RPC error response for the request ID given, using the code, message, and possible (JSON-encodable) argument passed in.

resultResponse

public static java.lang.String resultResponse(java.lang.Object id,
                                              java.lang.Object result)

Construct and encode a JSON-RPC success response for the request ID given, using the result value passed in.

response

public static java.lang.String response(java.lang.Object id,
                                        java.lang.String label,
                                        java.lang.Object value)

Private API - used by errorResponse and resultResponse.

getServiceDescription

public ServiceDescription getServiceDescription()

Public API - gets the service description record that this service built from interfaceClass at construction time.