/*
* Copyright 2016 NAVER Corp.
*
* Licensed 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 com.navercorp.pinpoint.common.server.bo.filter;
import com.navercorp.pinpoint.common.server.bo.SpanEventBo;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @author Woonduk Kang(emeroad)
*/
public class SequenceSpanEventFilter implements SpanEventFilter {
private final Logger logger = LoggerFactory.getLogger(this.getClass());
public static final int MAX_SEQUENCE = Short.MAX_VALUE;
public static final int DEFAULT_SEQUENCE_LIMIT = 1024*10;
private final int sequenceLimit;
public SequenceSpanEventFilter() {
this(DEFAULT_SEQUENCE_LIMIT);
}
public SequenceSpanEventFilter(int sequenceLimit) {
if (sequenceLimit > MAX_SEQUENCE) {
throw new IllegalArgumentException(sequenceLimit + " > MAX_SEQUENCE");
}
this.sequenceLimit = sequenceLimit;
}
@Override
public boolean filter(SpanEventBo spanEventBo) {
if (spanEventBo == null) {
return REJECT;
}
final int sequence = spanEventBo.getSequence();
if (sequence > sequenceLimit) {
if (logger.isDebugEnabled()) {
logger.debug("discard spanEvent:{}", spanEventBo);
}
return REJECT;
}
return ACCEPT;
}
}