guru.nidi.graphviz.engine.ResultHandler Maven / Gradle / Ivy
/*
* Copyright © 2015 Stefan Niederhauser ([email protected])
*
* 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 guru.nidi.graphviz.engine;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
//public because of nashorn
public class ResultHandler {
private final BlockingQueue value = new ArrayBlockingQueue<>(1);
private boolean ok;
public void setResult(String result) {
ok = true;
value.add(result);
}
public void setError(String error) {
ok = false;
value.add(error);
}
public String waitFor() {
try {
final String v = value.take();
if (ok) {
return v;
}
throw new GraphvizException(v);
} catch (InterruptedException e) {
throw new GraphvizException("Waiting for result interrupted", e);
}
}
}