/*
* 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.solr.logging;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.solr.common.SolrDocument;
import org.apache.solr.common.SolrDocumentList;
import org.apache.solr.core.CoreContainer;
/**
* A Class to monitor Logging events and hold N events in memory
*
* This is abstract so we can support both JUL and Log4j (and other logging platforms)
*/
public abstract class LogWatcher<E> {
protected CircularList<E> history;
protected long last = -1;
/**
* @return The implementation name
*/
public abstract String getName();
/**
* @return The valid level names for this framework
*/
public abstract List<String> getAllLevels();
/**
* Sets the log level within this framework
*/
public abstract void setLogLevel(String category, String level);
/**
* @return all registered loggers
*/
public abstract Collection<LoggerInfo> getAllLoggers();
public abstract void setThreshold(String level);
public abstract String getThreshold();
public void add(E event, long timstamp) {
history.add(event);
last = timstamp;
}
public long getLastEvent() {
return last;
}
public int getHistorySize() {
return (history==null) ? -1 : history.getBufferSize();
}
public SolrDocumentList getHistory(long since, AtomicBoolean found) {
if(history==null) {
return null;
}
SolrDocumentList docs = new SolrDocumentList();
Iterator<E> iter = history.iterator();
while(iter.hasNext()) {
E e = iter.next();
long ts = getTimestamp(e);
if(ts == since) {
if(found!=null) {
found.set(true);
}
}
if(ts>since) {
docs.add(toSolrDocument(e));
}
}
docs.setNumFound(docs.size()); // make it not look too funny
return docs;
}
public abstract long getTimestamp(E event);
public abstract SolrDocument toSolrDocument(E event);
public abstract void registerListener(ListenerConfig cfg, CoreContainer container);
public void reset() {
history.clear();
last = -1;
}
}