juzu.impl.io.SafeStream Maven / Gradle / Ivy
/*
* Copyright 2013 eXo Platform SAS
*
* 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 juzu.impl.io;
import juzu.io.Chunk;
import juzu.io.Stream;
import java.util.LinkedList;
/**
* An stream that handles error logging.
*
* @author Julien Viet
*/
public final class SafeStream implements Stream {
/** . */
private LinkedList errors;
/** . */
private final Stream delegate;
public SafeStream(Stream delegate) {
this.delegate = delegate;
}
private void log(Exception error) {
if (errors == null) {
errors = new LinkedList();
}
errors.add(error);
}
public void provide(Chunk chunk) {
try {
delegate.provide(chunk);
}
catch (Exception e) {
log(e);
}
}
public void close(Thread.UncaughtExceptionHandler errorHandler) {
try {
delegate.close(errorHandler);
}
catch (Exception e) {
log(e);
}
if (errorHandler != null && errors != null) {
for (Exception error : errors) {
errorHandler.uncaughtException(null, error);
}
}
}
}