/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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 com.hmsonline.storm.cassandra.exceptions;
import backtype.storm.topology.FailedException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import storm.trident.operation.TridentCollector;
import java.util.HashSet;
public class MappedExceptionHandler implements ExceptionHandler {
private static final long serialVersionUID = 1L;
private static final Logger LOG = LoggerFactory.getLogger(MappedExceptionHandler.class);
public static enum Action{
FAIL_TUPLE, REPORT_ERROR, KILL_WORKER, LOG
}
private HashSet<Class<? extends Exception>> failTupleExceptions = new HashSet<Class<? extends Exception>>();
private HashSet<Class<? extends Exception>> reportErrorExceptions = new HashSet<Class<? extends Exception>>();
private HashSet<Class<? extends Exception>> killWorkerExceptions = new HashSet<Class<? extends Exception>>();
private Action defaultAction = Action.LOG;
protected final void setDefaultAction(Action action){
this.defaultAction = action;
}
protected final void addFailOn(Class<? extends Exception>... exceptions) {
for (Class<? extends Exception> e : exceptions) {
if (reportErrorExceptions.contains(e) || killWorkerExceptions.contains(e)) {
throw new IllegalStateException("Exception " + e.getName() + " has already been registered.");
}
this.failTupleExceptions.add(e);
}
}
protected final void addReportOn(Class<? extends Exception>... exceptions) {
for (Class<? extends Exception> e : exceptions) {
if (failTupleExceptions.contains(e) || killWorkerExceptions.contains(e)) {
throw new IllegalStateException("Exception " + e.getName() + " has already been registered.");
}
this.reportErrorExceptions.add(e);
}
}
protected final void addDieOn(Class<? extends Exception>... exceptions) {
for (Class<? extends Exception> e : exceptions) {
if (failTupleExceptions.contains(e) || reportErrorExceptions.contains(e)) {
throw new IllegalStateException("Exception " + e.getName() + " has already been registered.");
}
this.killWorkerExceptions.add(e);
}
}
protected final Action actionFor(Exception e){
Class<? extends Exception> c = (Class<? extends Exception>)e.getClass();
if(this.failTupleExceptions.contains(c)){
return Action.FAIL_TUPLE;
} else if(this.killWorkerExceptions.contains(c)){
return Action.KILL_WORKER;
} else if(this.reportErrorExceptions.contains(c)){
return Action.REPORT_ERROR;
} else{
return this.defaultAction;
}
}
public MappedExceptionHandler failOn(Class<? extends Exception>... exceptions) {
addFailOn(exceptions);
return this;
}
public MappedExceptionHandler dieOn(Class<? extends Exception>... exceptions) {
addDieOn(exceptions);
return this;
}
public MappedExceptionHandler reportOn(Class<? extends Exception>... exceptions) {
addReportOn(exceptions);
return this;
}
public MappedExceptionHandler withDefaultAction(Action action) {
setDefaultAction(action);
return this;
}
@Override
public void onException(Exception e, TridentCollector collector) {
switch (actionFor(e)) {
case FAIL_TUPLE:
LOG.info("Failing batch based on registered exception " + e.getClass().getName() + ", Message: '"
+ e.getMessage() + "'", e);
throw new FailedException(e);
case REPORT_ERROR:
LOG.info(
"Reporting error based on registered exception " + e.getClass().getName() + ", Message: '"
+ e.getMessage() + "'", e);
if(collector != null){
collector.reportError(e);
}
break;
case KILL_WORKER:
LOG.warn("Killing worker/executor based on registered exception " + e.getClass().getName()
+ ", Message: '" + e.getMessage() + "'", e);
// wrap in RuntimeException in case FailedException has been
// explicitly registered.
throw new RuntimeException(e);
default:
LOG.warn("Inoring exception " + e.getClass().getName() + " and acknowledging batch. Message: '"
+ e.getMessage() + "'", e);
break;
}
}
}