1 /**
2  * Licensed to the Apache Software Foundation (ASF) under one
3  * or more contributor license agreements.  See the NOTICE file
4  * distributed with this work for additional information
5  * regarding copyright ownership.  The ASF licenses this file
6  * to you under the Apache License, Version 2.0 (the
7  * "License"); you may not use this file except in compliance
8  * with the License.  You may obtain a copy of the License at
9  *
10  *     http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18 
19 package org.apache.hadoop.yarn.server.resourcemanager.webapp;
20 
21 import static org.apache.hadoop.yarn.webapp.view.JQueryUI.DATATABLES_ID;
22 
23 import org.apache.hadoop.yarn.nodelabels.NodeLabel;
24 import org.apache.hadoop.yarn.server.resourcemanager.ResourceManager;
25 import org.apache.hadoop.yarn.server.resourcemanager.nodelabels.RMNodeLabelsManager;
26 import org.apache.hadoop.yarn.webapp.SubView;
27 import org.apache.hadoop.yarn.webapp.YarnWebParams;
28 import org.apache.hadoop.yarn.webapp.hamlet.Hamlet;
29 import org.apache.hadoop.yarn.webapp.hamlet.Hamlet.TABLE;
30 import org.apache.hadoop.yarn.webapp.hamlet.Hamlet.TBODY;
31 import org.apache.hadoop.yarn.webapp.hamlet.Hamlet.TR;
32 import org.apache.hadoop.yarn.webapp.view.HtmlBlock;
33 
34 import com.google.inject.Inject;
35 
36 public class NodeLabelsPage extends RmView {
37   static class NodeLabelsBlock extends HtmlBlock {
38     final ResourceManager rm;
39 
40     @Inject
NodeLabelsBlock(ResourceManager rm, ViewContext ctx)41     NodeLabelsBlock(ResourceManager rm, ViewContext ctx) {
42       super(ctx);
43       this.rm = rm;
44     }
45 
46     @Override
render(Block html)47     protected void render(Block html) {
48       TBODY<TABLE<Hamlet>> tbody = html.table("#nodelabels").
49           thead().
50           tr().
51           th(".name", "Label Name").
52           th(".numOfActiveNMs", "Num Of Active NMs").
53           th(".totalResource", "Total Resource").
54           _()._().
55           tbody();
56 
57       RMNodeLabelsManager nlm = rm.getRMContext().getNodeLabelManager();
58       for (NodeLabel info : nlm.pullRMNodeLabelsInfo()) {
59         TR<TBODY<TABLE<Hamlet>>> row =
60             tbody.tr().td(
61                 info.getLabelName().isEmpty() ? "<NO_LABEL>" : info
62                     .getLabelName());
63         int nActiveNMs = info.getNumActiveNMs();
64         if (nActiveNMs > 0) {
65           row = row.td()
66           .a(url("nodes",
67               "?" + YarnWebParams.NODE_LABEL + "=" + info.getLabelName()),
68               String.valueOf(nActiveNMs))
69            ._();
70         } else {
71           row = row.td(String.valueOf(nActiveNMs));
72         }
73         row.td(info.getResource().toString())._();
74       }
75       tbody._()._();
76     }
77   }
78 
preHead(Page.HTML<_> html)79   @Override protected void preHead(Page.HTML<_> html) {
80     commonPreHead(html);
81     String title = "Node labels of the cluster";
82     setTitle(title);
83     set(DATATABLES_ID, "nodelabels");
84     setTableStyles(html, "nodelabels", ".healthStatus {width:10em}",
85                    ".healthReport {width:10em}");
86   }
87 
content()88   @Override protected Class<? extends SubView> content() {
89     return NodeLabelsBlock.class;
90   }
91 }
92