hadoop LogEntryBuilder 源码
haddop LogEntryBuilder 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-core/src/main/java/org/apache/hadoop/yarn/service/monitor/probe/LogEntryBuilder.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.service.monitor.probe;
/**
* Build up log entries for ease of splunk
*/
public class LogEntryBuilder {
private final StringBuilder builder = new StringBuilder();
public LogEntryBuilder() {
}
public LogEntryBuilder(String text) {
elt(text);
}
public LogEntryBuilder(String name, Object value) {
entry(name, value);
}
public LogEntryBuilder elt(String text) {
addComma();
builder.append(text);
return this;
}
public LogEntryBuilder elt(String name, Object value) {
addComma();
entry(name, value);
return this;
}
private void addComma() {
if (!isEmpty()) {
builder.append(", ");
}
}
private void entry(String name, Object value) {
builder.append(name).append('=');
if (value != null) {
builder.append('"').append(value.toString()).append('"');
} else {
builder.append("null");
}
}
@Override
public String toString() {
return builder.toString();
}
private boolean isEmpty() {
return builder.length() == 0;
}
}
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