com.moz.fiji.schema.util.LogTimerAspect.java Source code

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Here is the source code for com.moz.fiji.schema.util.LogTimerAspect.java

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/**
 * (c) Copyright 2013 WibiData, Inc.
 *
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * 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.moz.fiji.schema.util;

import java.util.concurrent.ConcurrentHashMap;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;

import com.moz.fiji.annotations.ApiAudience;
import com.moz.fiji.annotations.ApiStability;

/**
 * Aspect to measure encoding and decoding of Fiji cells and time spent
 * accessing the meta table.
 */
@ApiAudience.Framework
@ApiStability.Experimental
@Aspect
public final class LogTimerAspect {
    /**
     * The ConcurrentHashMap containing information about a function call, the aggregate
     * time spent within this function and the number of times it was invoked.
     */
    private ConcurrentHashMap<String, LoggingInfo> mSignatureTimeMap = null;

    /**
     * Default constructor.
     */
    protected LogTimerAspect() {
        mSignatureTimeMap = new ConcurrentHashMap<String, LoggingInfo>();
    }

    /**
     * Get the HashMap of functions to information stored about them.
     *
     * @return HashMap containing function calls and time spent in them.
     */
    public ConcurrentHashMap<String, LoggingInfo> getSignatureTimeMap() {
        return mSignatureTimeMap;
    }

    /**
     * Advice around functions that match PointCut "profile".
     *
     * @param thisJoinPoint The JoinPoint that matched the pointcut.
     * @return Object returned by function which matched PointCut "profile".
     * @throws Throwable if there is an exception in the function the advice surrounds.
     */
    @Around("execution(* com.moz.fiji.schema.FijiCellDecoder.*(..)) || "
            + "execution(* com.moz.fiji.schema.FijiCellEncoder.*(..)) || "
            + "execution(* com.moz.fiji.schema.FijiMetaTable.*(..)) || "
            + "execution(* com.moz.fiji.schema.FijiSchemaTable.*(..)) || "
            + "execution(* com.moz.fiji.schema.FijiPutter.put(..))")
    public Object aroundProfileMethods(final ProceedingJoinPoint thisJoinPoint) throws Throwable {
        final long start, end;
        start = System.nanoTime();
        Object returnanswer = thisJoinPoint.proceed();
        end = System.nanoTime();
        String funcSig = thisJoinPoint.getSignature().toLongString();
        if (!mSignatureTimeMap.containsKey(funcSig)) {
            mSignatureTimeMap.put(funcSig, new LoggingInfo(end - start, 1));
        } else {
            mSignatureTimeMap.get(funcSig).increment(end - start);
        }
        return returnanswer;
    }
}