org.apache.hadoop.mapreduce.v2.app.webapp.TasksBlock.java Source code

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Here is the source code for org.apache.hadoop.mapreduce.v2.app.webapp.TasksBlock.java

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/**
* 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.mapreduce.v2.app.webapp;

import static org.apache.hadoop.mapreduce.v2.app.webapp.AMParams.TASK_STATE;
import static org.apache.hadoop.mapreduce.v2.app.webapp.AMParams.TASK_TYPE;
import static org.apache.hadoop.yarn.util.StringHelper.join;
import static org.apache.hadoop.yarn.webapp.view.JQueryUI.C_PROGRESSBAR;
import static org.apache.hadoop.yarn.webapp.view.JQueryUI.C_PROGRESSBAR_VALUE;

import org.apache.commons.lang.StringEscapeUtils;
import org.apache.hadoop.mapreduce.v2.api.records.TaskType;
import org.apache.hadoop.mapreduce.v2.app.job.Task;
import org.apache.hadoop.mapreduce.v2.app.webapp.dao.TaskInfo;
import org.apache.hadoop.mapreduce.v2.util.MRApps;
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.yarn.webapp.hamlet.Hamlet;
import org.apache.hadoop.yarn.webapp.hamlet.Hamlet.TABLE;
import org.apache.hadoop.yarn.webapp.hamlet.Hamlet.TBODY;
import org.apache.hadoop.yarn.webapp.view.HtmlBlock;

import com.google.inject.Inject;

public class TasksBlock extends HtmlBlock {
    final App app;

    @Inject
    TasksBlock(App app) {
        this.app = app;
    }

    @Override
    protected void render(Block html) {
        if (app.getJob() == null) {
            html.h2($(TITLE));
            return;
        }
        TaskType type = null;
        String symbol = $(TASK_TYPE);
        if (!symbol.isEmpty()) {
            type = MRApps.taskType(symbol);
        }
        TBODY<TABLE<Hamlet>> tbody = html.table("#tasks").thead().tr().th("Task").th("Progress").th("Status")
                .th("State").th("Start Time").th("Finish Time").th("Elapsed Time")._()._().tbody();
        StringBuilder tasksTableData = new StringBuilder("[\n");

        for (Task task : app.getJob().getTasks().values()) {
            if (type != null && task.getType() != type) {
                continue;
            }
            String taskStateStr = $(TASK_STATE);
            if (taskStateStr == null || taskStateStr.trim().equals("")) {
                taskStateStr = "ALL";
            }

            if (!taskStateStr.equalsIgnoreCase("ALL")) {
                try {
                    // get stateUI enum
                    MRApps.TaskStateUI stateUI = MRApps.taskState(taskStateStr);
                    if (!stateUI.correspondsTo(task.getState())) {
                        continue;
                    }
                } catch (IllegalArgumentException e) {
                    continue; // not supported state, ignore
                }
            }

            TaskInfo info = new TaskInfo(task);
            String tid = info.getId();
            String pct = StringUtils.format("%.2f", info.getProgress());
            tasksTableData.append("[\"<a href='").append(url("task", tid)).append("'>").append(tid)
                    .append("</a>\",\"")
                    //Progress bar
                    .append("<br title='").append(pct).append("'> <div class='").append(C_PROGRESSBAR)
                    .append("' title='").append(join(pct, '%')).append("'> ").append("<div class='")
                    .append(C_PROGRESSBAR_VALUE).append("' style='").append(join("width:", pct, '%'))
                    .append("'> </div> </div>\",\"")
                    .append(StringEscapeUtils.escapeJavaScript(StringEscapeUtils.escapeHtml(info.getStatus())))
                    .append("\",\"")

                    .append(info.getState()).append("\",\"").append(info.getStartTime()).append("\",\"")
                    .append(info.getFinishTime()).append("\",\"").append(info.getElapsedTime()).append("\"],\n");
        }
        //Remove the last comma and close off the array of arrays
        if (tasksTableData.charAt(tasksTableData.length() - 2) == ',') {
            tasksTableData.delete(tasksTableData.length() - 2, tasksTableData.length() - 1);
        }
        tasksTableData.append("]");
        html.script().$type("text/javascript")._("var tasksTableData=" + tasksTableData)._();

        tbody._()._();
    }
}