content: /*
   * Tencent is pleased to support the open source community by making Angel available.
   *
   * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
   *
   * 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
   *
   * https://opensource.org/licenses/Apache-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 com.tencent.angel.webapp.page;
  
  import com.google.inject.Inject;
  import com.google.protobuf.ServiceException;
  import com.tencent.angel.exception.UnvalidIdStrException;
  import com.tencent.angel.master.app.AMContext;
  import com.tencent.angel.master.client.PSClient;
  import com.tencent.angel.ps.PSAttemptId;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.hadoop.yarn.webapp.view.HtmlBlock;
  
  import java.io.IOException;
  
  import static com.tencent.angel.webapp.AngelParams.PSATTEMPT_ID;
  import static org.apache.hadoop.yarn.util.StringHelper.join;
  
  
  public class ParameterServerThreadStackBlock extends HtmlBlock {
    final AMContext amContext;
    private static final Log LOG = LogFactory.getLog(ParameterServerThreadStackBlock.class);
  
    @Inject ParameterServerThreadStackBlock(AMContext amctx) {
      amContext = amctx;
      amContext.getParameterServerManager();
    }
  
    @Override protected void render(Block html) {
      set(TITLE, join("Angel ParameterServerThread ", $(PSATTEMPT_ID)));
      PSAttemptId psAttempttId = null;
      try {
        psAttempttId = new PSAttemptId($(PSATTEMPT_ID));
      } catch (UnvalidIdStrException e) {
        LOG.error("unvalid id string, ", e);
        return;
      }
  
      try {
        LOG.info("start init PSClient");
        PSClient psClient = new PSClient(amContext, psAttempttId);
        String info = psClient.getThreadStack();
        html.pre()._(info)._();
      } catch (IOException | ServiceException e) {
        LOG.error("get thread stack from ps " + psAttempttId + " failed. ", e);
      }
    }
  
  }
  