/*
* 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 org.apache.brooklyn.core.mgmt.persist;
import java.util.List;
import java.util.Map;
import org.apache.brooklyn.util.collections.MutableList;
import org.apache.brooklyn.util.collections.MutableMap;
import org.apache.brooklyn.util.time.Duration;
public class PersistenceActivityMetrics {
final static int MAX_ERRORS = 200;
long count=0, failureCount=0;
Long lastSuccessTime, lastDuration, lastFailureTime;
List<Map<String,Object>> errorMessages = MutableList.of();
public void noteSuccess(Duration duration) {
count++;
lastSuccessTime = System.currentTimeMillis();
lastDuration = duration.toMilliseconds();
}
public void noteFailure(Duration duration) {
count++;
failureCount++;
lastFailureTime = System.currentTimeMillis();
lastDuration = duration!=null ? duration.toMilliseconds() : -1;
}
public void noteError(String error) {
noteErrorObject(error);
}
public void noteError(List<?> error) {
noteErrorObject(error);
}
/** error should be json-serializable; exceptions can be problematic */
protected synchronized void noteErrorObject(Object error) {
errorMessages.add(0, MutableMap.<String,Object>of("error", error, "timestamp", System.currentTimeMillis()));
while (errorMessages.size() > MAX_ERRORS) {
errorMessages.remove(errorMessages.size()-1);
}
}
public synchronized Map<String,Object> asMap() {
Map<String,Object> result = MutableMap.of();
result.put("count", count);
result.put("lastSuccessTimeUtc", lastSuccessTime);
result.put("lastSuccessTimeMillisSince", since(lastSuccessTime));
result.put("lastDuration", lastDuration);
result.put("failureCount", failureCount);
result.put("lastFailureTimeUtc", lastFailureTime);
result.put("lastFailureTimeMillisSince", since(lastFailureTime));
result.put("errorMessages", MutableList.copyOf(errorMessages));
return result;
}
private Long since(Long time) {
if (time==null) return null;
return System.currentTimeMillis() - time;
}
}