/*
* Copyright © 2014 Cask Data, Inc.
*
* 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 co.cask.cdap.logging.appender;
import ch.qos.logback.classic.AsyncAppender;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.Context;
import ch.qos.logback.core.filter.Filter;
import ch.qos.logback.core.spi.FilterReply;
import ch.qos.logback.core.status.Status;
import ch.qos.logback.core.status.StatusManager;
import co.cask.cdap.logging.LoggingConfiguration;
import com.google.inject.Inject;
import com.google.inject.name.Named;
import java.util.List;
import java.util.concurrent.TimeUnit;
/**
* Delegates all calls to an async log appender.
*/
public final class AsyncLogAppender extends LogAppender {
private final AsyncAppender asyncAppender;
private final LogAppender logAppender;
@Inject
public AsyncLogAppender(@Named(LoggingConfiguration.SYNC_LOG_APPENDER_ANNOTATION) LogAppender logAppender) {
this.logAppender = logAppender;
this.asyncAppender = new AsyncAppender();
asyncAppender.setIncludeCallerData(true);
asyncAppender.setQueueSize(1000);
asyncAppender.setDiscardingThreshold(0);
asyncAppender.setName("async-" + logAppender.getName());
}
@Override
public String getName() {
return "forward-" + asyncAppender.getName();
}
@Override
public void append(LogMessage logMessage) {
asyncAppender.doAppend(logMessage);
}
@Override
public void doAppend(ILoggingEvent eventObject) {
append(eventObject);
}
@Override
public void setName(String name) {
logAppender.setName(name);
asyncAppender.setName("async-" + logAppender.getName());
}
@Override
public void start() {
logAppender.start();
asyncAppender.addAppender(logAppender);
asyncAppender.start();
}
@Override
public void stop() {
asyncAppender.stop();
// No need to stop logAppender here since asyncAppender stops it.
// However, we will need to wait until logAppender has completely stopped, since the wait time in AsyncAppender
// may not be sufficient for a clean shutdown.
long startTime = System.currentTimeMillis();
while (logAppender.isStarted() &&
System.currentTimeMillis() - startTime < TimeUnit.MILLISECONDS.convert(5, TimeUnit.SECONDS)) {
try {
TimeUnit.MILLISECONDS.sleep(100);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
}
@Override
public boolean isStarted() {
return logAppender.isStarted() && asyncAppender.isStarted();
}
@Override
public String toString() {
return logAppender.toString();
}
@Override
public void addFilter(Filter<ILoggingEvent> newFilter) {
logAppender.addFilter(newFilter);
}
@Override
public void clearAllFilters() {
logAppender.clearAllFilters();
}
@Override
public List<Filter<ILoggingEvent>> getCopyOfAttachedFiltersList() {
return logAppender.getCopyOfAttachedFiltersList();
}
@Override
public FilterReply getFilterChainDecision(ILoggingEvent event) {
return logAppender.getFilterChainDecision(event);
}
@Override
public void setContext(Context context) {
logAppender.setContext(context);
asyncAppender.setContext(context);
}
@Override
public Context getContext() {
return logAppender.getContext();
}
@Override
public StatusManager getStatusManager() {
return logAppender.getStatusManager();
}
@Override
protected Object getDeclaredOrigin() {
return logAppender;
}
@Override
public void addStatus(Status status) {
logAppender.addStatus(status);
}
@Override
public void addInfo(String msg) {
logAppender.addInfo(msg);
}
@Override
public void addInfo(String msg, Throwable ex) {
logAppender.addInfo(msg, ex);
}
@Override
public void addWarn(String msg) {
logAppender.addWarn(msg);
}
@Override
public void addWarn(String msg, Throwable ex) {
logAppender.addWarn(msg, ex);
}
@Override
public void addError(String msg) {
logAppender.addError(msg);
}
@Override
public void addError(String msg, Throwable ex) {
logAppender.addError(msg, ex);
}
}