/*
* Copyright 2010 The Apache Software Foundation
*
* 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.hadoop.hbase.stargate;
import java.io.IOException;
import javax.servlet.ServletContext;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.CacheControl;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriInfo;
import javax.ws.rs.core.Response.ResponseBuilder;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.stargate.model.VersionModel;
/**
* Implements Stargate software version reporting via
* <p>
* <tt>/version/stargate</tt>
* <p>
* <tt>/version</tt> (alias for <tt>/version/stargate</tt>)
*/
public class VersionResource implements Constants {
private static final Log LOG = LogFactory.getLog(VersionResource.class);
private CacheControl cacheControl;
private RESTServlet servlet;
public VersionResource() throws IOException {
servlet = RESTServlet.getInstance();
cacheControl = new CacheControl();
cacheControl.setNoCache(true);
cacheControl.setNoTransform(false);
}
/**
* Build a response for a version request.
* @param context servlet context
* @param uriInfo (JAX-RS context variable) request URL
* @return a response for a version request
*/
@GET
@Produces({MIMETYPE_TEXT, MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF})
public Response get(final @Context ServletContext context,
final @Context UriInfo uriInfo) {
if (LOG.isDebugEnabled()) {
LOG.debug("GET " + uriInfo.getAbsolutePath());
}
servlet.getMetrics().incrementRequests(1);
ResponseBuilder response = Response.ok(new VersionModel(context));
response.cacheControl(cacheControl);
return response.build();
}
/**
* Dispatch to StorageClusterVersionResource
*/
@Path("cluster")
public StorageClusterVersionResource getClusterVersionResource()
throws IOException {
return new StorageClusterVersionResource();
}
/**
* Dispatch <tt>/version/stargate</tt> to self.
*/
@Path("stargate")
public VersionResource getVersionResource() {
return this;
}
}