001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.rest;
019
020import java.io.IOException;
021import javax.servlet.ServletContext;
022import org.apache.hadoop.hbase.rest.model.NamespacesModel;
023import org.apache.yetus.audience.InterfaceAudience;
024import org.slf4j.Logger;
025import org.slf4j.LoggerFactory;
026
027import org.apache.hbase.thirdparty.javax.ws.rs.GET;
028import org.apache.hbase.thirdparty.javax.ws.rs.Path;
029import org.apache.hbase.thirdparty.javax.ws.rs.PathParam;
030import org.apache.hbase.thirdparty.javax.ws.rs.Produces;
031import org.apache.hbase.thirdparty.javax.ws.rs.core.Context;
032import org.apache.hbase.thirdparty.javax.ws.rs.core.Response;
033import org.apache.hbase.thirdparty.javax.ws.rs.core.UriInfo;
034
035/**
036 * Implements REST GET list of all namespaces.
037 * <p>
038 * <tt>/namespaces</tt>
039 * <p>
040 */
041@InterfaceAudience.Private
042public class NamespacesResource extends ResourceBase {
043
044  private static final Logger LOG = LoggerFactory.getLogger(NamespacesResource.class);
045
046  /**
047   * Constructor n
048   */
049  public NamespacesResource() throws IOException {
050    super();
051  }
052
053  /**
054   * Build a response for a list of all namespaces request.
055   * @param context servlet context
056   * @param uriInfo (JAX-RS context variable) request URL
057   * @return a response for a version request
058   */
059  @GET
060  @Produces({ MIMETYPE_TEXT, MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF,
061    MIMETYPE_PROTOBUF_IETF })
062  public Response get(final @Context ServletContext context, final @Context UriInfo uriInfo) {
063    if (LOG.isTraceEnabled()) {
064      LOG.trace("GET " + uriInfo.getAbsolutePath());
065    }
066    servlet.getMetrics().incrementRequests(1);
067    try {
068      NamespacesModel rowModel = null;
069      rowModel = new NamespacesModel(servlet.getAdmin());
070      servlet.getMetrics().incrementSucessfulGetRequests(1);
071      return Response.ok(rowModel).build();
072    } catch (IOException e) {
073      servlet.getMetrics().incrementFailedGetRequests(1);
074      throw new RuntimeException("Cannot retrieve list of namespaces.");
075    }
076  }
077
078  /**
079   * Dispatch to NamespaceInstanceResource
080   */
081  @Path("{namespace}")
082  public NamespacesInstanceResource getNamespaceInstanceResource(
083    final @PathParam("namespace") String namespace) throws IOException {
084    return new NamespacesInstanceResource(namespace);
085  }
086}