/*
* 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.jackrabbit.servlet.jackrabbit;
import java.io.IOException;
import java.io.Writer;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.jackrabbit.api.stats.RepositoryStatistics;
import org.apache.jackrabbit.api.stats.TimeSeries;
import org.apache.jackrabbit.core.RepositoryContext;
/**
* Servlet that makes Jackrabbit repository statistics available as
* a JSON object.
*
* @since Apache Jackrabbit 2.3.1
*/
public class StatisticsServlet extends HttpServlet {
/** Serial version UID */
private static final long serialVersionUID = -7494195499389135951L;
@Override
protected void doGet(
HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String klass = RepositoryContext.class.getName();
String name = getServletConfig().getInitParameter(klass);
if (name == null) {
name = klass;
}
RepositoryContext context = (RepositoryContext)
getServletContext().getAttribute(name);
if (context != null) {
RepositoryStatistics statistics = context.getRepositoryStatistics();
response.setContentType("application/json");
Writer writer = response.getWriter();
writer.write('{');
write(writer, "read", statistics.getTimeSeries(
RepositoryStatistics.Type.SESSION_READ_COUNTER));
writer.write(',');
write(writer, "write", statistics.getTimeSeries(
RepositoryStatistics.Type.SESSION_WRITE_COUNTER));
writer.write(',');
write(writer, "login", statistics.getTimeSeries(
RepositoryStatistics.Type.SESSION_LOGIN_COUNTER));
writer.write('}');
} else {
response.sendError(
HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
"Jackrabbit repository internals are not available");
}
}
private void write(Writer writer, String name, TimeSeries series)
throws IOException {
writer.write('"');
writer.write(name);
writer.write('"');
writer.write(':');
writer.write('{');
write(writer, "second", series.getValuePerSecond());
writer.write(',');
write(writer, "minute", series.getValuePerMinute());
writer.write(',');
write(writer, "hour", series.getValuePerHour());
writer.write(',');
write(writer, "week", series.getValuePerWeek());
writer.write('}');
}
private void write(Writer writer, String name, long[] values)
throws IOException {
writer.write('"');
writer.write(name);
writer.write('"');
writer.write(':');
writer.write('[');
for (int i = 0; i < values.length; i++) {
if (i > 0) {
writer.write(',');
}
writer.write(String.valueOf(values[i]));
}
writer.write(']');
}
}