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VoltDB client interface libraries
/*
* Copyright 2013 The Netty Project
*
* The Netty Project licenses this file to you 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 io.netty_voltpatches.util.concurrent;
import java.util.concurrent.Callable;
import java.util.concurrent.RunnableFuture;
class PromiseTask extends DefaultPromise implements RunnableFuture {
static Callable toCallable(Runnable runnable, T result) {
return new RunnableAdapter(runnable, result);
}
private static final class RunnableAdapter implements Callable {
final Runnable task;
final T result;
RunnableAdapter(Runnable task, T result) {
this.task = task;
this.result = result;
}
@Override
public T call() {
task.run();
return result;
}
@Override
public String toString() {
return "Callable(task: " + task + ", result: " + result + ')';
}
}
protected final Callable task;
PromiseTask(EventExecutor executor, Runnable runnable, V result) {
this(executor, toCallable(runnable, result));
}
PromiseTask(EventExecutor executor, Callable callable) {
super(executor);
task = callable;
}
@Override
public final int hashCode() {
return System.identityHashCode(this);
}
@Override
public final boolean equals(Object obj) {
return this == obj;
}
@Override
public void run() {
try {
if (setUncancellableInternal()) {
V result = task.call();
setSuccessInternal(result);
}
} catch (Throwable e) {
setFailureInternal(e);
}
}
@Override
public final Promise setFailure(Throwable cause) {
throw new IllegalStateException();
}
protected final Promise setFailureInternal(Throwable cause) {
super.setFailure(cause);
return this;
}
@Override
public final boolean tryFailure(Throwable cause) {
return false;
}
protected final boolean tryFailureInternal(Throwable cause) {
return super.tryFailure(cause);
}
@Override
public final Promise setSuccess(V result) {
throw new IllegalStateException();
}
protected final Promise setSuccessInternal(V result) {
super.setSuccess(result);
return this;
}
@Override
public final boolean trySuccess(V result) {
return false;
}
protected final boolean trySuccessInternal(V result) {
return super.trySuccess(result);
}
@Override
public final boolean setUncancellable() {
throw new IllegalStateException();
}
protected final boolean setUncancellableInternal() {
return super.setUncancellable();
}
@Override
protected StringBuilder toStringBuilder() {
StringBuilder buf = super.toStringBuilder();
buf.setCharAt(buf.length() - 1, ',');
return buf.append(" task: ")
.append(task)
.append(')');
}
}