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package org.glassfish.hk2.runlevel.internal;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executor;
import javax.inject.Inject;
import org.glassfish.hk2.api.MultiException;
import org.glassfish.hk2.runlevel.CurrentlyRunningException;
import org.glassfish.hk2.runlevel.RunLevelController;
import org.glassfish.hk2.runlevel.RunLevelFuture;
import org.jvnet.hk2.annotations.ContractsProvided;
import org.jvnet.hk2.annotations.Service;
/**
* This is the implementation of the RunLevelController
*
* @author jwells
*/
@Service @ContractsProvided(RunLevelController.class)
public class RunLevelControllerImpl implements RunLevelController {
@Inject
private AsyncRunLevelContext context;
@Override
public void proceedTo(int runLevel) {
RunLevelFuture future = context.proceedTo(runLevel);
if (future == null) return; // Happens if USE_NO_THREADS is true
try {
future.get();
}
catch (InterruptedException e) {
throw new MultiException(e);
}
catch (ExecutionException e) {
Throwable cause = e.getCause();
if (cause instanceof RuntimeException) {
throw (RuntimeException) cause;
}
throw new MultiException(cause);
}
}
/* (non-Javadoc)
* @see org.glassfish.hk2.runlevel.RunLevelController#proceedTo(int)
*/
@Override
public RunLevelFuture proceedToAsync(int runLevel)
throws CurrentlyRunningException, IllegalStateException {
if (context.getPolicy().equals(ThreadingPolicy.USE_NO_THREADS)) {
throw new IllegalStateException("Cannot use proceedToAsync if the threading policy is USE_NO_THREADS");
}
return context.proceedTo(runLevel);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.runlevel.RunLevelController#getCurrentProceeding()
*/
@Override
public RunLevelFuture getCurrentProceeding() {
return context.getCurrentFuture();
}
/* (non-Javadoc)
* @see org.glassfish.hk2.runlevel.RunLevelController#cancel()
*/
@Override
public void cancel() {
RunLevelFuture rlf = getCurrentProceeding();
if (rlf == null) return;
rlf.cancel(false);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.runlevel.RunLevelController#getCurrentRunLevel()
*/
@Override
public int getCurrentRunLevel() {
return context.getCurrentLevel();
}
@Override
public void setMaximumUseableThreads(int maximumThreads) {
if (maximumThreads < 1) {
throw new IllegalArgumentException("maximumThreads must be at least 1, but it is " +
maximumThreads);
}
context.setMaximumThreads(maximumThreads);
}
@Override
public int getMaximumUseableThreads() {
return context.getMaximumThreads();
}
@Override
public void setThreadingPolicy(ThreadingPolicy policy) {
if (policy == null) throw new IllegalArgumentException();
context.setPolicy(policy);
}
@Override
public ThreadingPolicy getThreadingPolicy() {
return context.getPolicy();
}
@Override
public void setExecutor(Executor executor) {
context.setExecutor(executor);
}
@Override
public Executor getExecutor() {
return context.getExecutor();
}
}