Describe the advantages and disadvantages of web service applications that use either synchronous/request response, one-way RPC, or non-blocking RPC invocation modes.

Describe the advantages and disadvantages of web service applications that use either synchronous/request response, one-way RPC, or non-blocking RPC invocation modes.
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Synchrous request-response mode:

Client's thread blocks until a return value or exception is returned

One-way RPC mode:

Client's thread continues processing
No return value or exception is expected

Example:


...
<portType name="HelloOneWayIF">
	<operation name="oneWayValueType">
		<input message="tns:HelloOneWayIF_oneWayValueType"/>
	</operation>
</portType>

<binding name="HelloOneWayIFBinding" type="tns:HelloOneWayIF">
	<operation name="oneWayValueType">
		<input>
			<soap:body use="literal"/>
		</input>
		<soap:operation soapAction=""/>
	</operation>

	<soap:binding transport="http://schemas.xmlsoap.org/soap/http" style="document"/>
</binding>
...

Non-blocking RPC invocation mode:

A client invokes a remote procedure and continues in its thread without blocking
Later, the client processes the remote method return by performing a blocked receive call or by polling for the return value

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Explain the advantages and disadvantages of a WSDL to Java vs. a Java to WSDL development approach.	Home	Use the JAX-RPC Handler API to create a SOAP message handler, describe the function of a handler chain, and describe the role of SAAJ when creating a message handler.