/*
* 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.ambari.logfeeder.output;
import org.apache.ambari.logfeeder.common.LogFeederConstants;
import org.apache.ambari.logfeeder.input.Input;
import org.apache.ambari.logfeeder.input.cache.LRUCache;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Map;
/**
* Filter for outputs based on input configs, which can drop lines if the filter applies.
*/
public class OutputLineFilter {
private static final Logger LOG = LoggerFactory.getLogger(OutputLineFilter.class);
/**
* Applies filter based on input cache (on service log only).
* Get the message and in-memory timestamp for log line. If both are not empty, evaluate that log line needs to be filtered out or not.
*/
public Boolean apply(Map<String, Object> lineMap, Input input) {
boolean isLogFilteredOut = false;
LRUCache inputLruCache = input.getCache();
if (inputLruCache != null && "service".equals(input.getConfigs().get(LogFeederConstants.ROW_TYPE))) {
String logMessage = (String) lineMap.get(input.getCacheKeyField());
Long timestamp = null;
if (lineMap.containsKey((LogFeederConstants.IN_MEMORY_TIMESTAMP))) {
timestamp = (Long) lineMap.get(LogFeederConstants.IN_MEMORY_TIMESTAMP);
}
if (logMessage != null && timestamp != null) {
isLogFilteredOut = !inputLruCache.isEntryReplaceable(logMessage, timestamp);
if (!isLogFilteredOut) {
inputLruCache.put(logMessage, timestamp);
} else {
LOG.debug("Log line filtered out: {} (file: {}, dedupInterval: {}, lastDedupEnabled: {})",
logMessage, inputLruCache.getFileName(), inputLruCache.getDedupInterval(), inputLruCache.isLastDedupEnabled());
}
}
}
if (lineMap.containsKey(LogFeederConstants.IN_MEMORY_TIMESTAMP)) {
lineMap.remove(LogFeederConstants.IN_MEMORY_TIMESTAMP);
}
return isLogFilteredOut;
}
}