/*
* Copyright 2011-2013 the original author or authors.
*
* 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 org.springframework.data.mongodb.log4j;
import java.net.UnknownHostException;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Map;
import org.apache.log4j.AppenderSkeleton;
import org.apache.log4j.Level;
import org.apache.log4j.MDC;
import org.apache.log4j.PatternLayout;
import org.apache.log4j.spi.LoggingEvent;
import com.mongodb.BasicDBList;
import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.Mongo;
import com.mongodb.WriteConcern;
/**
* Log4j appender writing log entries into a MongoDB instance.
*
* @author Jon Brisbin
* @author Oliver Gierke
*/
public class MongoLog4jAppender extends AppenderSkeleton {
public static final String LEVEL = "level";
public static final String NAME = "name";
public static final String APP_ID = "applicationId";
public static final String TIMESTAMP = "timestamp";
public static final String PROPERTIES = "properties";
public static final String TRACEBACK = "traceback";
public static final String MESSAGE = "message";
public static final String YEAR = "year";
public static final String MONTH = "month";
public static final String DAY = "day";
public static final String HOUR = "hour";
protected String host = "localhost";
protected int port = 27017;
protected String database = "logs";
protected String collectionPattern = "%c";
protected PatternLayout collectionLayout = new PatternLayout(collectionPattern);
protected String applicationId = System.getProperty("APPLICATION_ID", null);
protected WriteConcern warnOrHigherWriteConcern = WriteConcern.SAFE;
protected WriteConcern infoOrLowerWriteConcern = WriteConcern.NORMAL;
protected Mongo mongo;
protected DB db;
public MongoLog4jAppender() {
}
public MongoLog4jAppender(boolean isActive) {
super(isActive);
}
public String getHost() {
return host;
}
public void setHost(String host) {
this.host = host;
}
public int getPort() {
return port;
}
public void setPort(int port) {
this.port = port;
}
public String getDatabase() {
return database;
}
public void setDatabase(String database) {
this.database = database;
}
public String getCollectionPattern() {
return collectionPattern;
}
public void setCollectionPattern(String collectionPattern) {
this.collectionPattern = collectionPattern;
this.collectionLayout = new PatternLayout(collectionPattern);
}
public String getApplicationId() {
return applicationId;
}
public void setApplicationId(String applicationId) {
this.applicationId = applicationId;
}
public void setWarnOrHigherWriteConcern(String wc) {
this.warnOrHigherWriteConcern = WriteConcern.valueOf(wc);
}
public String getWarnOrHigherWriteConcern() {
return warnOrHigherWriteConcern.toString();
}
public String getInfoOrLowerWriteConcern() {
return infoOrLowerWriteConcern.toString();
}
public void setInfoOrLowerWriteConcern(String wc) {
this.infoOrLowerWriteConcern = WriteConcern.valueOf(wc);
}
protected void connectToMongo() throws UnknownHostException {
this.mongo = new Mongo(host, port);
this.db = mongo.getDB(database);
}
/*
* (non-Javadoc)
* @see org.apache.log4j.AppenderSkeleton#append(org.apache.log4j.spi.LoggingEvent)
*/
@Override
@SuppressWarnings({ "unchecked" })
protected void append(final LoggingEvent event) {
if (null == db) {
try {
connectToMongo();
} catch (UnknownHostException e) {
throw new RuntimeException(e.getMessage(), e);
}
}
BasicDBObject dbo = new BasicDBObject();
if (null != applicationId) {
dbo.put(APP_ID, applicationId);
MDC.put(APP_ID, applicationId);
}
dbo.put(NAME, event.getLogger().getName());
dbo.put(LEVEL, event.getLevel().toString());
Calendar tstamp = Calendar.getInstance();
tstamp.setTimeInMillis(event.getTimeStamp());
dbo.put(TIMESTAMP, tstamp.getTime());
// Copy properties into document
Map<Object, Object> props = event.getProperties();
if (null != props && props.size() > 0) {
BasicDBObject propsDbo = new BasicDBObject();
for (Map.Entry<Object, Object> entry : props.entrySet()) {
propsDbo.put(entry.getKey().toString(), entry.getValue().toString());
}
dbo.put(PROPERTIES, propsDbo);
}
// Copy traceback info (if there is any) into the document
String[] traceback = event.getThrowableStrRep();
if (null != traceback && traceback.length > 0) {
BasicDBList tbDbo = new BasicDBList();
tbDbo.addAll(Arrays.asList(traceback));
dbo.put(TRACEBACK, tbDbo);
}
// Put the rendered message into the document
dbo.put(MESSAGE, event.getRenderedMessage());
// Insert the document
Calendar now = Calendar.getInstance();
MDC.put(YEAR, now.get(Calendar.YEAR));
MDC.put(MONTH, String.format("%1$02d", now.get(Calendar.MONTH) + 1));
MDC.put(DAY, String.format("%1$02d", now.get(Calendar.DAY_OF_MONTH)));
MDC.put(HOUR, String.format("%1$02d", now.get(Calendar.HOUR_OF_DAY)));
String coll = collectionLayout.format(event);
MDC.remove(YEAR);
MDC.remove(MONTH);
MDC.remove(DAY);
MDC.remove(HOUR);
if (null != applicationId) {
MDC.remove(APP_ID);
}
WriteConcern wc;
if (event.getLevel().isGreaterOrEqual(Level.WARN)) {
wc = warnOrHigherWriteConcern;
} else {
wc = infoOrLowerWriteConcern;
}
db.getCollection(coll).insert(dbo, wc);
}
/*
* (non-Javadoc)
* @see org.apache.log4j.AppenderSkeleton#close()
*/
public void close() {
if (mongo != null) {
mongo.close();
}
}
/*
* (non-Javadoc)
* @see org.apache.log4j.AppenderSkeleton#requiresLayout()
*/
public boolean requiresLayout() {
return true;
}
}