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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
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*
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package com.sun.xml.internal.ws.api.server;
import com.sun.istack.internal.NotNull;
import com.sun.istack.internal.Nullable;
import com.sun.xml.internal.ws.api.BindingID;
import com.sun.xml.internal.ws.api.WSBinding;
import com.sun.xml.internal.ws.api.message.Message;
import com.sun.xml.internal.ws.api.message.Packet;
import com.sun.xml.internal.ws.api.model.SEIModel;
import com.sun.xml.internal.ws.api.model.wsdl.WSDLPort;
import com.sun.xml.internal.ws.api.pipe.Codec;
import com.sun.xml.internal.ws.api.pipe.Engine;
import com.sun.xml.internal.ws.api.pipe.FiberContextSwitchInterceptor;
import com.sun.xml.internal.ws.api.pipe.ServerTubeAssemblerContext;
import com.sun.xml.internal.ws.api.pipe.Tube;
import com.sun.xml.internal.ws.server.EndpointFactory;
import com.sun.xml.internal.ws.util.xml.XmlUtil;
import org.xml.sax.EntityResolver;
import javax.xml.namespace.QName;
import javax.xml.ws.Binding;
import javax.xml.ws.WebServiceContext;
import javax.xml.ws.WebServiceException;
import java.net.URL;
import java.util.Collection;
import java.util.Set;
import java.util.concurrent.Executor;
/**
* Root object that hosts the {@link Packet} processing code
* at the server.
*
* <p>
* One instance of {@link WSEndpoint} is created for each deployed service
* endpoint. A hosted service usually handles multiple concurrent
* requests. To do this efficiently, an endpoint handles incoming
* {@link Packet} through {@link PipeHead}s, where many copies can be created
* for each endpoint.
*
* <p>
* Each {@link PipeHead} is thread-unsafe, and request needs to be
* serialized. A {@link PipeHead} represents a sizable resource
* (in particular a whole pipeline), so the caller is expected to
* reuse them and avoid excessive allocations as much as possible.
* Making {@link PipeHead}s thread-unsafe allow the JAX-WS RI internal to
* tie thread-local resources to {@link PipeHead}, and reduce the total
* resource management overhead.
*
* <p>
* To abbreviate this resource management (and for a few other reasons),
* JAX-WS RI provides {@link Adapter} class. If you are hosting a JAX-WS
* service, you'll most likely want to send requests to {@link WSEndpoint}
* through {@link Adapter}.
*
* <p>
* {@link WSEndpoint} is ready to handle {@link Packet}s as soon as
* it's created. No separate post-initialization step is necessary.
* However, to comply with the JAX-WS spec requirement, the caller
* is expected to call the {@link #dispose()} method to allow an
* orderly shut-down of a hosted service.
*
*
*
* <h3>Objects Exposed From Endpoint</h3>
* <p>
* {@link WSEndpoint} exposes a series of information that represents
* how an endpoint is configured to host a service. See the getXXX methods
* for more details.
*
*
*
* <h3>Implementation Notes</h3>
* <p>
* {@link WSEndpoint} owns a {@link WSWebServiceContext} implementation.
* But a bulk of the work is delegated to {@link WebServiceContextDelegate},
* which is passed in as a parameter to {@link PipeHead#process(Packet, WebServiceContextDelegate, TransportBackChannel)}.
*
* @author Kohsuke Kawaguchi
*/
public abstract class WSEndpoint<T> {
/**
* Gets the Endpoint's codec that is used to encode/decode {@link Message}s. This is a
* copy of the master codec and it shouldn't be shared across two requests running
* concurrently(unless it is stateless).
*
* @return codec to encode/decode
*/
public abstract @NotNull Codec createCodec();
/**
* Gets the application endpoint's serviceName. It could be got from DD or annotations
*
* @return same as wsdl:service QName if WSDL exists or generated
*/
public abstract @NotNull QName getServiceName();
/**
* Gets the application endpoint's portName. It could be got from DD or annotations
*
* @return same as wsdl:port QName if WSDL exists or generated
*/
public abstract @NotNull QName getPortName();
/**
* Gets the application endpoint {@link Class} that eventually serves the request.
*
* <p>
* This is the same value given to the {@link #create} method.
*/
public abstract @NotNull Class<T> getImplementationClass();
/**
* Represents the binding for which this {@link WSEndpoint}
* is created for.
*
* @return
* always same object.
*/
public abstract @NotNull WSBinding getBinding();
/**
* Gets the {@link Container} object.
*
* <p>
* The components inside {@link WSEndpoint} uses this reference
* to communicate with the hosting environment.
*
* @return
* always same object. If no "real" {@link Container} instance
* is given, {@link Container#NONE} will be returned.
*/
public abstract @NotNull Container getContainer();
/**
* Gets the port that this endpoint is serving.
*
* <p>
* A service is not required to have a WSDL, and when it doesn't,
* this method returns null. Otherwise it returns an object that
* describes the port that this {@link WSEndpoint} is serving.
*
* @return
* Possibly null, but always the same value.
*/
public abstract @Nullable WSDLPort getPort();
/**
* Set this {@link Executor} to run asynchronous requests using this executor.
* This executor is set on {@link Engine} and must be set before
* calling {@link #schedule(Packet,CompletionCallback) } and
* {@link #schedule(Packet,CompletionCallback,FiberContextSwitchInterceptor)} methods.
*
* @param exec Executor to run async requests
*/
public abstract void setExecutor(@NotNull Executor exec);
/**
* This method takes a {@link Packet} that represents
* a request, run it through a {@link Tube}line, eventually
* pass it to the user implementation code, which produces
* a reply, then run that through the tubeline again,
* and eventually return it as a return value through {@link CompletionCallback}.
*
* <p>
* This takes care of pooling of {@link Tube}lines and reuses
* tubeline for requests. Same instance of tubeline is not used concurrently
* for two requests.
*
* <p>
* If the transport is capable of asynchronous execution, use this
* instead of using {@link PipeHead#process}.
*
* <p>
* Before calling this method, set the executor using {@link #setExecutor}. The
* executor may used multiple times to run this request in a asynchronous fashion.
* The calling thread will be returned immediately, and the callback will be
* called in a different a thread.
*
* <p>
* {@link Packet#transportBackChannel} should have the correct value, so that
* one-way message processing happens correctly. {@link Packet#webServiceContextDelegate}
* should have the correct value, so that some {@link WebServiceContext} methods correctly.
*
* @see {@link Packet#transportBackChannel}
* @see {@link Packet#webServiceContextDelegate}
*
* @param request web service request
* @param callback callback to get response packet
*/
public final void schedule(@NotNull Packet request, @NotNull CompletionCallback callback ) {
schedule(request,callback,null);
}
/**
* Schedule invocation of web service asynchronously.
*
* @see {@link #schedule(Packet, CompletionCallback)}
*
* @param request web service request
* @param callback callback to get response packet(exception if there is one)
* @param interceptor caller's interceptor to impose a context of execution
*/
public abstract void schedule(@NotNull Packet request, @NotNull CompletionCallback callback, @Nullable FiberContextSwitchInterceptor interceptor );
/**
* Callback to notify that jax-ws runtime has finished execution of a request
* submitted via schedule().
*/
public interface CompletionCallback {
/**
* Indicates that the jax-ws runtime has finished execution of a request
* submitted via schedule().
*
* <p>
* Since the JAX-WS RI runs asynchronously,
* this method maybe invoked by a different thread
* than any of the threads that started it or run a part of tubeline.
*
* @param response {@link Packet}
*/
void onCompletion(@NotNull Packet response);
}
/**
* Creates a new {@link PipeHead} to process
* incoming requests.
*
* <p>
* This is not a cheap operation. The caller is expected
* to reuse the returned {@link PipeHead}. See
* {@link WSEndpoint class javadoc} for details.
*
* @return
* A newly created {@link PipeHead} that's ready to serve.
*/
public abstract @NotNull PipeHead createPipeHead();
/**
* Represents a resource local to a thread.
*
* See {@link WSEndpoint} class javadoc for more discussion about
* this.
*/
public interface PipeHead {
/**
* Processes a request and produces a reply.
*
* <p>
* This method takes a {@link Packet} that represents
* a request, run it through a {@link Tube}line, eventually
* pass it to the user implementation code, which produces
* a reply, then run that through the pipeline again,
* and eventually return it as a return value.
*
* @param request
* Unconsumed {@link Packet} that represents
* a request.
* @param wscd
* {@link WebServiceContextDelegate} to be set to {@link Packet}.
* (we didn't have to take this and instead just ask the caller to
* set to {@link Packet#webServiceContextDelegate}, but that felt
* too error prone.)
* @param tbc
* {@link TransportBackChannel} to be set to {@link Packet}.
* See the {@code wscd} parameter javadoc for why this is a parameter.
* Can be null.
* @return
* Unconsumed {@link Packet} that represents
* a reply to the request.
*
* @throws WebServiceException
* This method <b>does not</b> throw a {@link WebServiceException}.
* The {@link WSEndpoint} must always produce a fault {@link Message}
* for it.
*
* @throws RuntimeException
* A {@link RuntimeException} thrown from this method, including
* {@link WebServiceException}, must be treated as a bug in the
* code (including JAX-WS and all the pipe implementations), not
* an operator error by the user.
*
* <p>
* Therefore, it should be recorded by the caller in a way that
* allows developers to fix a bug.
*/
@NotNull Packet process(
@NotNull Packet request, @Nullable WebServiceContextDelegate wscd, @Nullable TransportBackChannel tbc);
}
/**
* Indicates that the {@link WSEndpoint} is about to be turned off,
* and will no longer serve any packet anymore.
*
* <p>
* This method needs to be invoked for the JAX-WS RI to correctly
* implement some of the spec semantics (TODO: pointer.)
* It's the responsibility of the code that hosts a {@link WSEndpoint}
* to invoke this method.
*
* <p>
* Once this method is called, the behavior is undefed for
* all in-progress {@link PipeHead#process} methods (by other threads)
* and future {@link PipeHead#process} method invocations.
*/
public abstract void dispose();
/**
* Gets the description of the service.
*
* <p>
* A description is a set of WSDL/schema and other documents that together
* describes a service.
* A service is not required to have a description, and when it doesn't,
* this method returns null.
*
* @return
* Possibly null, but always the same value.
*/
public abstract @Nullable ServiceDefinition getServiceDefinition();
/**
* Gets the list of {@link EndpointComponent} that are associated
* with this endpoint.
*
* <p>
* Components (such as codec, tube, handler, etc) who wish to provide
* some service to other components in the endpoint can iterate the
* registry and call its {@link EndpointComponent#getSPI(Class)} to
* establish a private contract between components.
* <p>
* Components who wish to subscribe to such a service can add itself
* to this set.
*
* @return
* always return the same set.
*/
public abstract @NotNull Set<EndpointComponent> getComponentRegistry();
/**
* Gets the {@link com.sun.xml.internal.ws.api.model.SEIModel} that represents the relationship
* between WSDL and Java SEI.
*
* <p>
* This method returns a non-null value if and only if this
* endpoint is ultimately serving an application through an SEI.
*
* @return
* maybe null. See above for more discussion.
* Always the same value.
*/
public abstract @Nullable SEIModel getSEIModel();
/**
* Creates an endpoint from deployment or programmatic configuration
*
* <p>
* This method works like the following:
* <ol>
* <li>{@link ServiceDefinition} is modeleed from the given SEI type.
* <li>{@link Invoker} that always serves <tt>implementationObject</tt> will be used.
* </ol>
* @param implType
* Endpoint class(not SEI). Enpoint class must have @WebService or @WebServiceProvider
* annotation.
* @param processHandlerAnnotation
* Flag to control processing of @HandlerChain on Impl class
* if true, processes @HandlerChain on Impl
* if false, DD might have set HandlerChain no need to parse.
* @param invoker
* Pass an object to invoke the actual endpoint object. If it is null, a default
* invoker is created using {@link InstanceResolver#createDefault}. Appservers
* could create its own invoker to do additional functions like transactions,
* invoking the endpoint through proxy etc.
* @param serviceName
* Optional service name(may be from DD) to override the one given by the
* implementation class. If it is null, it will be derived from annotations.
* @param portName
* Optional port name(may be from DD) to override the one given by the
* implementation class. If it is null, it will be derived from annotations.
* @param container
* Allows technologies that are built on top of JAX-WS(such as WSIT) needs to
* negotiate private contracts between them and the container
* @param binding
* JAX-WS implementation of {@link Binding}. This object can be created by
* {@link BindingID#createBinding()}. Usually the binding can be got from
* DD, {@link javax.xml.ws.BindingType}.
*
*
* TODO: DD has a configuration for MTOM threshold.
* Maybe we need something more generic so that other technologies
* like Tango can get information from DD.
*
* TODO: does it really make sense for this to take EntityResolver?
* Given that all metadata has to be given as a list anyway.
*
* @param primaryWsdl
* The {@link ServiceDefinition#getPrimary() primary} WSDL.
* If null, it'll be generated based on the SEI (if this is an SEI)
* or no WSDL is associated (if it's a provider.)
* TODO: shouldn't the implementation find this from the metadata list?
* @param metadata
* Other documents that become {@link SDDocument}s. Can be null.
* @param resolver
* Optional resolver used to de-reference resources referenced from
* WSDL. Must be null if the {@code url} is null.
* @param isTransportSynchronous
* If the caller knows that the returned {@link WSEndpoint} is going to be
* used by a synchronous-only transport, then it may pass in <tt>true</tt>
* to allow the callee to perform an optimization based on that knowledge
* (since often synchronous version is cheaper than an asynchronous version.)
* This value is visible from {@link ServerTubeAssemblerContext#isSynchronous()}.
*
* @return newly constructed {@link WSEndpoint}.
* @throws WebServiceException
* if the endpoint set up fails.
*/
public static <T> WSEndpoint<T> create(
@NotNull Class<T> implType,
boolean processHandlerAnnotation,
@Nullable Invoker invoker,
@Nullable QName serviceName,
@Nullable QName portName,
@Nullable Container container,
@Nullable WSBinding binding,
@Nullable SDDocumentSource primaryWsdl,
@Nullable Collection<? extends SDDocumentSource> metadata,
@Nullable EntityResolver resolver,
boolean isTransportSynchronous) {
return EndpointFactory.createEndpoint(
implType,processHandlerAnnotation, invoker,serviceName,portName,container,binding,primaryWsdl,metadata,resolver,isTransportSynchronous);
}
/**
* Deprecated version that assumes <tt>isTransportSynchronous==false</tt>
*/
@Deprecated
public static <T> WSEndpoint<T> create(
@NotNull Class<T> implType,
boolean processHandlerAnnotation,
@Nullable Invoker invoker,
@Nullable QName serviceName,
@Nullable QName portName,
@Nullable Container container,
@Nullable WSBinding binding,
@Nullable SDDocumentSource primaryWsdl,
@Nullable Collection<? extends SDDocumentSource> metadata,
@Nullable EntityResolver resolver) {
return create(implType,processHandlerAnnotation,invoker,serviceName,portName,container,binding,primaryWsdl,metadata,resolver,false);
}
/**
* The same as
* {@link #create(Class, boolean, Invoker, QName, QName, Container, WSBinding, SDDocumentSource, Collection, EntityResolver)}
* except that this version takes an url of the <tt>jax-ws-catalog.xml</tt>.
*
* @param catalogUrl
* if not null, an {@link EntityResolver} is created from it and used.
* otherwise no resolution will be performed.
*/
public static <T> WSEndpoint<T> create(
@NotNull Class<T> implType,
boolean processHandlerAnnotation,
@Nullable Invoker invoker,
@Nullable QName serviceName,
@Nullable QName portName,
@Nullable Container container,
@Nullable WSBinding binding,
@Nullable SDDocumentSource primaryWsdl,
@Nullable Collection<? extends SDDocumentSource> metadata,
@Nullable URL catalogUrl) {
return create(
implType,processHandlerAnnotation,invoker,serviceName,portName,container,binding,primaryWsdl,metadata,
XmlUtil.createEntityResolver(catalogUrl),false);
}
/**
* Gives the wsdl:service default name computed from the endpoint implementaiton class
*/
public static @NotNull QName getDefaultServiceName(Class endpointClass){
return EndpointFactory.getDefaultServiceName(endpointClass);
}
/**
* Gives the wsdl:service/wsdl:port default name computed from the endpoint implementaiton class
*/
public static @NotNull QName getDefaultPortName(@NotNull QName serviceName, Class endpointClass){
return EndpointFactory.getDefaultPortName(serviceName, endpointClass);
}
}