com.apple.foundationdb.testing.Promise Maven / Gradle / Ivy
/*
* Promise.java
*
* This source file is part of the FoundationDB open source project
*
* Copyright 2013-2019 Apple Inc. and the FoundationDB project 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.apple.foundationdb.testing;
public class Promise {
private long nativePromise;
private boolean wasSet;
private static native void send(long self, boolean value);
private Promise(long nativePromise) {
this.nativePromise = nativePromise;
this.wasSet = false;
}
public boolean canBeSet() {
return !wasSet;
}
public void send(boolean value) {
if (wasSet) {
throw new IllegalStateException("Promise was already set");
}
wasSet = true;
send(nativePromise, value);
}
}