com.sun.grizzly.arp.AsyncProcessorTask Maven / Gradle / Ivy
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package com.sun.grizzly.arp;
import com.sun.grizzly.http.ProcessorTask;
import com.sun.grizzly.http.SelectorThread;
import com.sun.grizzly.http.TaskBase;
import java.util.logging.Level;
/**
* A {@link Task} that wraps the execution of an asynchronous execution
* of a {@link ProcessorTask}. Internaly, this class invoke the associated
* {@link AsyncExecutor} method to execute the {@link ProcessorTask}
* lifecycle operations.
*
* @author Jeanfrancois Arcand
*/
public class AsyncProcessorTask extends TaskBase implements AsyncTask {
/**
* The {@link AsyncExecutor} which drive the execution of the
* {@link ProcessorTask}
*/
private AsyncExecutor asyncExecutor;
/**
* The current execution stage.
*/
private int stage = AsyncTask.PRE_EXECUTE;
/**
* Execute the {@link AsyncExecutor} based on the stage
* of the {@link ProcessorTask} execution.
*/
public void doTask() throws java.io.IOException {
boolean continueExecution = true;
while (continueExecution) {
try {
switch (stage) {
case AsyncTask.PRE_EXECUTE:
continueExecution = asyncExecutor.preExecute();
if (!continueExecution) {
asyncExecutor.getAsyncHandler().returnTask(this);
return;
} else {
stage = AsyncTask.INTERRUPTED;
}
break;
case AsyncTask.INTERRUPTED:
stage = AsyncTask.POST_EXECUTE;
continueExecution = asyncExecutor.interrupt();
break;
case AsyncTask.EXECUTE:
continueExecution = asyncExecutor.execute();
stage = AsyncTask.POST_EXECUTE;
break;
case AsyncTask.POST_EXECUTE:
asyncExecutor.postExecute();
asyncExecutor.getAsyncHandler().returnTask(this);
return;
}
} catch (Throwable t) {
SelectorThread.logger().log(Level.SEVERE, t.getMessage(), t);
if (stage <= AsyncTask.INTERRUPTED) {
// We must close the connection.
stage = AsyncTask.POST_EXECUTE;
} else {
stage = AsyncTask.PRE_EXECUTE;
throw new RuntimeException(t);
}
}
}
}
/**
* Return the stage of the current execution.
*/
public int getStage() {
return stage;
}
/**
* Reset the object.
*/
@Override
public void recycle() {
stage = AsyncTask.PRE_EXECUTE;
}
/**
* Set the {@link AsyncExecutor} used by this {@link Task}
* to delegate the execution of a {@link ProcessorTask}.
*/
public void setAsyncExecutor(AsyncExecutor asyncExecutor) {
this.asyncExecutor = asyncExecutor;
}
/**
* Get the {@link AsyncExecutor}.
*/
public AsyncExecutor getAsyncExecutor() {
return asyncExecutor;
}
/**
* Set the current execution stage.
*/
public void setStage(int stage) {
this.stage = stage;
}
/**
* Set the {@link ProcessorTask} used to execute the request processing.
* @param task a {@link ProcessorTask}
* @deprecated - Use {@link AsyncExecutor#setProcessorTask}
*/
public void setProcessorTask(ProcessorTask task){
// Do nothing
}
/**
* The {@link ProcessorTask} used to execute the request processing.
* @return {@link ProcessorTask} used to execute the request processing.
* @deprecated - Use {@link AsyncExecutor#getProcessorTask}
*/
public ProcessorTask getProcessorTask(){
return (asyncExecutor == null ? null : asyncExecutor.getProcessorTask());
}
}