org.glassfish.jersey.client.ClientRuntime Maven / Gradle / Ivy
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package org.glassfish.jersey.client;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import javax.ws.rs.client.ClientException;
import org.glassfish.jersey.client.spi.AsyncConnectorCallback;
import org.glassfish.jersey.client.spi.Connector;
import org.glassfish.jersey.process.internal.ChainableStage;
import org.glassfish.jersey.process.internal.RequestScope;
import org.glassfish.jersey.process.internal.Stage;
import org.glassfish.jersey.process.internal.Stages;
import org.glassfish.hk2.api.ServiceLocator;
/**
* Client-side request processing runtime.
*
* @author Marek Potociar (marek.potociar at oracle.com)
*/
class ClientRuntime {
private final Stage requestProcessingRoot;
private final Stage responseProcessingRoot;
private final Connector connector;
private final RequestScope requestScope;
private final ClientAsyncExecutorsFactory asyncExecutorsFactory;
/**
* Create new client request processing runtime.
*
* @param connector client transport connector.
* @param locator HK2 service locator.
*/
public ClientRuntime(final Connector connector, final ServiceLocator locator) {
final Stage.Builder requestingChainBuilder = Stages
.chain(locator.createAndInitialize(RequestProcessingInitializationStage.class));
final ChainableStage requestFilteringStage =
ClientFilteringStages.createRequestFilteringStage(locator);
this.requestProcessingRoot = requestFilteringStage != null ?
requestingChainBuilder.build(requestFilteringStage) : requestingChainBuilder.build();
final ChainableStage responseFilteringStage =
ClientFilteringStages.createResponseFilteringStage(locator);
this.responseProcessingRoot = responseFilteringStage != null ?
responseFilteringStage : Stages.identity();
this.connector = connector;
this.requestScope = locator.getService(RequestScope.class);
this.asyncExecutorsFactory = new ClientAsyncExecutorsFactory(locator);
}
/**
* Submit a {@link ClientRequest client request} for asynchronous processing.
*
* Both, the request processing as well as response callback invocation will be executed
* in a context of an active {@link RequestScope.Instance request scope instance}.
*
*
* @param request client request to be sent.
* @param callback asynchronous response callback.
*/
public void submit(final ClientRequest request, final ResponseCallback callback) {
submit(asyncExecutorsFactory.getRequestingExecutor(request), new Runnable() {
@Override
public void run() {
final RequestScope.Instance currentScopeInstance = requestScope.referenceCurrent();
final AsyncConnectorCallback connectorCallback = new AsyncConnectorCallback() {
@Override
public void response(final ClientResponse response) {
submit(asyncExecutorsFactory.getRespondingExecutor(request), currentScopeInstance, new Runnable() {
@Override
public void run() {
final ClientResponse processedResponse;
try {
processedResponse = Stages.process(response, responseProcessingRoot);
} catch (Throwable throwable) {
failure(throwable);
return;
}
try {
callback.completed(processedResponse, requestScope);
} finally {
currentScopeInstance.release();
}
}
});
}
@Override
public void failure(Throwable failure) {
try {
callback.failed(failure instanceof ClientException ?
(ClientException) failure : new ClientException(failure));
} finally {
currentScopeInstance.release();
}
}
};
try {
connector.apply(Stages.process(request, requestProcessingRoot), connectorCallback);
} catch (AbortException aborted) {
connectorCallback.response(aborted.getAbortResponse());
} catch (Throwable throwable) {
connectorCallback.failure(throwable);
}
}
});
}
private Future submit(final ExecutorService executor, final Runnable task) {
return executor.submit(new Runnable() {
@Override
public void run() {
requestScope.runInScope(task);
}
});
}
private Future submit(final ExecutorService executor, final RequestScope.Instance scopeInstance, final Runnable task) {
return executor.submit(new Runnable() {
@Override
public void run() {
requestScope.runInScope(scopeInstance, task);
}
});
}
/**
* Invoke a request processing synchronously in the context of the caller's thread.
*
* NOTE: the method does not explicitly start a new request scope context. Instead
* it is assumed that the method is invoked from within a context of a proper, running
* {@link RequestScope.Instance request scope instance}. A caller may use the
* {@link #getRequestScope()} method to retrieve the request scope instance and use it to
* initialize the proper request scope context prior the method invocation.
*
*
* @param request client request to be invoked.
* @return client response.
* @throws ClientException in case of an invocation failure.
*/
public ClientResponse invoke(final ClientRequest request) throws ClientException {
ClientResponse response;
try {
try {
response = connector.apply(Stages.process(request, requestProcessingRoot));
} catch (AbortException aborted) {
response = aborted.getAbortResponse();
}
return Stages.process(response, responseProcessingRoot);
} catch (ClientException ex) {
throw ex;
} catch (Throwable t) {
throw new ClientException(t.getMessage(), t);
}
}
/**
* Get the request scope instance configured for the runtime.
*
* @return request scope instance.
*/
public RequestScope getRequestScope() {
return requestScope;
}
/**
* Close the client runtime and release the underlying transport connector.
*/
public void close() {
connector.close();
}
}