hadoop HeaderBlock 源码
haddop HeaderBlock 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/view/HeaderBlock.java
/**
* 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.yarn.webapp.view;
import org.apache.hadoop.classification.InterfaceAudience;
@InterfaceAudience.LimitedPrivate({"YARN", "MapReduce"})
public class HeaderBlock extends HtmlBlock {
@Override protected void render(Block html) {
String loggedIn = "";
if (request().getRemoteUser() != null) {
loggedIn = "Logged in as: " + request().getRemoteUser();
}
html.
div("#header.ui-widget").
div("#user").
__(loggedIn).__().
div("#logo").
img("/static/hadoop-st.png").__().
h1($(TITLE)).__();
}
}
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