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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright (C) 2015 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.common.util.concurrent;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;

import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.ImmutableCollection;
import com.google.j2objc.annotations.WeakOuter;
import java.util.concurrent.Callable;
import java.util.concurrent.CancellationException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executor;
import java.util.concurrent.RejectedExecutionException;
import org.checkerframework.checker.nullness.compatqual.NullableDecl;

/** Aggregate future that computes its value by calling a callable. */
@GwtCompatible
final class CombinedFuture extends AggregateFuture {
  CombinedFuture(
      ImmutableCollection> futures,
      boolean allMustSucceed,
      Executor listenerExecutor,
      AsyncCallable callable) {
    init(
        new CombinedFutureRunningState(
            futures,
            allMustSucceed,
            new AsyncCallableInterruptibleTask(callable, listenerExecutor)));
  }

  CombinedFuture(
      ImmutableCollection> futures,
      boolean allMustSucceed,
      Executor listenerExecutor,
      Callable callable) {
    init(
        new CombinedFutureRunningState(
            futures, allMustSucceed, new CallableInterruptibleTask(callable, listenerExecutor)));
  }

  private final class CombinedFutureRunningState extends RunningState {
    private CombinedFutureInterruptibleTask task;

    CombinedFutureRunningState(
        ImmutableCollection> futures,
        boolean allMustSucceed,
        CombinedFutureInterruptibleTask task) {
      super(futures, allMustSucceed, false);
      this.task = task;
    }

    @Override
    void collectOneValue(boolean allMustSucceed, int index, @NullableDecl Object returnValue) {}

    @Override
    void handleAllCompleted() {
      CombinedFutureInterruptibleTask localTask = task;
      if (localTask != null) {
        localTask.execute();
      } else {
        checkState(isDone());
      }
    }

    @Override
    void releaseResourcesAfterFailure() {
      super.releaseResourcesAfterFailure();
      this.task = null;
    }

    @Override
    void interruptTask() {
      CombinedFutureInterruptibleTask localTask = task;
      if (localTask != null) {
        localTask.interruptTask();
      }
    }
  }

  @WeakOuter
  private abstract class CombinedFutureInterruptibleTask extends InterruptibleTask {
    private final Executor listenerExecutor;
    boolean thrownByExecute = true;

    public CombinedFutureInterruptibleTask(Executor listenerExecutor) {
      this.listenerExecutor = checkNotNull(listenerExecutor);
    }

    @Override
    final boolean isDone() {
      return CombinedFuture.this.isDone();
    }

    final void execute() {
      try {
        listenerExecutor.execute(this);
      } catch (RejectedExecutionException e) {
        if (thrownByExecute) {
          setException(e);
        }
      }
    }

    @Override
    final void afterRanInterruptibly(T result, Throwable error) {
      if (error != null) {
        if (error instanceof ExecutionException) {
          setException(error.getCause());
        } else if (error instanceof CancellationException) {
          cancel(false);
        } else {
          setException(error);
        }
      } else {
        setValue(result);
      }
    }

    abstract void setValue(T value);
  }

  @WeakOuter
  private final class AsyncCallableInterruptibleTask
      extends CombinedFutureInterruptibleTask> {
    private final AsyncCallable callable;

    public AsyncCallableInterruptibleTask(AsyncCallable callable, Executor listenerExecutor) {
      super(listenerExecutor);
      this.callable = checkNotNull(callable);
    }

    @Override
    ListenableFuture runInterruptibly() throws Exception {
      thrownByExecute = false;
      ListenableFuture result = callable.call();
      return checkNotNull(
          result,
          "AsyncCallable.call returned null instead of a Future. "
              + "Did you mean to return immediateFuture(null)?");
    }

    @Override
    void setValue(ListenableFuture value) {
      setFuture(value);
    }

    @Override
    String toPendingString() {
      return callable.toString();
    }
  }

  @WeakOuter
  private final class CallableInterruptibleTask extends CombinedFutureInterruptibleTask {
    private final Callable callable;

    public CallableInterruptibleTask(Callable callable, Executor listenerExecutor) {
      super(listenerExecutor);
      this.callable = checkNotNull(callable);
    }

    @Override
    V runInterruptibly() throws Exception {
      thrownByExecute = false;
      return callable.call();
    }

    @Override
    void setValue(V value) {
      CombinedFuture.this.set(value);
    }

    @Override
    String toPendingString() {
      return callable.toString();
    }
  }
}