hadoop LogParser 源码
haddop LogParser 代码
文件路径：/hadoop-tools/hadoop-resourceestimator/src/main/java/org/apache/hadoop/resourceestimator/translator/api/LogParser.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.resourceestimator.translator.api;
import java.io.IOException;
import java.io.InputStream;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.resourceestimator.common.exception.ResourceEstimatorException;
import org.apache.hadoop.resourceestimator.skylinestore.api.HistorySkylineStore;
import org.apache.hadoop.resourceestimator.skylinestore.exceptions.SkylineStoreException;
/**
* LogParser iterates over a stream of logs, uses {@link SingleLineParser} to
* parse each line, and adds extracted {@code ResourceSkyline}s to the
* {@code SkylineStore}.
*/
public interface LogParser extends AutoCloseable {
/**
* Initializing the LogParser, including loading solver parameters from
* configuration file.
*
* @param config {@link Configuration} for the LogParser.
* @param skylineStore the {@link HistorySkylineStore} which stores recurring
* pipeline's {@code
* ResourceSkyline}s.
* @throws ResourceEstimatorException if initialization of a
* {@code SingleLineParser} fails.
*/
void init(Configuration config, HistorySkylineStore skylineStore)
throws ResourceEstimatorException;
/**
* Parses each line in the log stream, and adds extracted
* {@code ResourceSkyline}s to the {@code
* SkylineStore}.
*
* @param logs the stream of input logs.
* @throws SkylineStoreException if it fails to addHistory extracted
* {@code ResourceSkyline}s to the {@code SkylineStore}.
* @throws IOException if it fails to read from the {@link InputStream}.
*/
void parseStream(InputStream logs) throws SkylineStoreException, IOException;
@Override void close();
}
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