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From lstav <...@git.apache.org>
Subject [GitHub] accumulo pull request #242: ACCUMULO-2181/3005 REST API and new Monitor UI
Date Wed, 12 Apr 2017 14:00:56 GMT
Github user lstav commented on a diff in the pull request:

    https://github.com/apache/accumulo/pull/242#discussion_r111157832
  
    --- Diff: server/monitor/src/main/java/org/apache/accumulo/monitor/rest/tservers/TabletServerResource.java
---
    @@ -0,0 +1,336 @@
    +/*
    + * 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.accumulo.monitor.rest.tservers;
    +
    +import java.lang.management.ManagementFactory;
    +import java.security.MessageDigest;
    +import java.util.ArrayList;
    +import java.util.Base64;
    +import java.util.HashMap;
    +import java.util.List;
    +import java.util.Map;
    +
    +import javax.ws.rs.Consumes;
    +import javax.ws.rs.GET;
    +import javax.ws.rs.POST;
    +import javax.ws.rs.Path;
    +import javax.ws.rs.PathParam;
    +import javax.ws.rs.Produces;
    +import javax.ws.rs.QueryParam;
    +import javax.ws.rs.WebApplicationException;
    +import javax.ws.rs.core.MediaType;
    +import javax.ws.rs.core.Response.Status;
    +
    +import org.apache.accumulo.core.Constants;
    +import org.apache.accumulo.core.client.impl.ClientContext;
    +import org.apache.accumulo.core.client.impl.Tables;
    +import org.apache.accumulo.core.conf.Property;
    +import org.apache.accumulo.core.data.impl.KeyExtent;
    +import org.apache.accumulo.core.master.thrift.MasterMonitorInfo;
    +import org.apache.accumulo.core.master.thrift.RecoveryStatus;
    +import org.apache.accumulo.core.master.thrift.TabletServerStatus;
    +import org.apache.accumulo.core.rpc.ThriftUtil;
    +import org.apache.accumulo.core.tabletserver.thrift.ActionStats;
    +import org.apache.accumulo.core.tabletserver.thrift.TabletClientService;
    +import org.apache.accumulo.core.tabletserver.thrift.TabletStats;
    +import org.apache.accumulo.core.trace.Tracer;
    +import org.apache.accumulo.core.util.AddressUtil;
    +import org.apache.accumulo.core.zookeeper.ZooUtil;
    +import org.apache.accumulo.monitor.Monitor;
    +import org.apache.accumulo.monitor.rest.master.MasterResource;
    +import org.apache.accumulo.server.client.HdfsZooInstance;
    +import org.apache.accumulo.server.master.state.DeadServerList;
    +import org.apache.accumulo.server.util.ActionStatsUpdator;
    +
    +import com.google.common.net.HostAndPort;
    +
    +/**
    + *
    + * Generates tserver lists as JSON objects
    + *
    + * @since 2.0.0
    + *
    + */
    +@Path("/tservers")
    +@Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
    +public class TabletServerResource {
    +
    +  // Variable names become JSON keys
    +  private TabletStats total, historical;
    +
    +  /**
    +   * Generates tserver summary
    +   *
    +   * @return tserver summary
    +   */
    +  @GET
    +  public TabletServers getTserverSummary() {
    +    MasterMonitorInfo mmi = Monitor.getMmi();
    +    if (null == mmi) {
    +      throw new WebApplicationException(Status.INTERNAL_SERVER_ERROR);
    +    }
    +
    +    TabletServers tserverInfo = new TabletServers(mmi.tServerInfo.size());
    +    for (TabletServerStatus status : mmi.tServerInfo) {
    +      tserverInfo.addTablet(new TabletServer(status));
    +    }
    +
    +    tserverInfo.addBadTabletServer(new MasterResource().getTables());
    +
    +    return tserverInfo;
    +  }
    +
    +  /**
    +   * REST call to clear dead servers from list
    +   *
    +   * @param server
    +   *          Dead server to clear
    +   */
    +  @POST
    +  @Consumes(MediaType.TEXT_PLAIN)
    +  public void clearDeadServer(@QueryParam("server") String server) throws Exception {
    +    DeadServerList obit = new DeadServerList(ZooUtil.getRoot(Monitor.getContext().getInstance())
+ Constants.ZDEADTSERVERS);
    +    obit.delete(server);
    +  }
    +
    +  /**
    +   * Generates a recovery tserver list
    +   *
    +   * @return Recovery tserver list
    +   */
    +  @Path("recovery")
    +  @GET
    +  public Map<String,List<Map<String,String>>> getTserverRecovery()
{
    --- End diff --
    
    I decided to just create another class for this, since I think it is much easier to follow
the classes than the Map.


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