de.codecentric.capturereplay.CaptureReplayAdvice.java Source code

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Here is the source code for de.codecentric.capturereplay.CaptureReplayAdvice.java

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/*
 * Copyright 2014 the original author or authors.
 *
 * 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 de.codecentric.capturereplay;

import de.codecentric.capturereplay.data.DataMapper;
import org.apache.commons.lang3.Validate;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.beans.factory.InitializingBean;

@Aspect
public class CaptureReplayAdvice implements InitializingBean {

    private Mode mode;

    private DataMapper dataMapper;

    @Around("execution(@de.codecentric.capturereplay.Capturable * *(..))")
    public Object aroundCapturableMethod(ProceedingJoinPoint pjp) throws Throwable {
        MethodSignature signature = (MethodSignature) pjp.getSignature();
        if (Mode.CAPTURE.equals(mode)) {
            Object returnValue = pjp.proceed();
            dataMapper.writeCapturedData(signature, returnValue, pjp.getArgs());
            return returnValue;
        } else if (Mode.REPLAY.equals(mode)) {
            return dataMapper.getCapturedData(signature.getMethod().getName(), pjp.getArgs());
        } else if (Mode.DISABLED.equals(mode)) {
            return pjp.proceed();
        } else {
            throw new IllegalCaptureReplayUsageException(
                    String.format("Capturing/replaying is switched off. You should not use %s directly.",
                            this.getClass().getSimpleName()));
        }
    }

    public void setMode(Mode mode) {
        preventIllegalModeChange(mode);
        this.mode = mode;
    }

    public void setDataMapper(DataMapper dataMapper) {
        this.dataMapper = dataMapper;
    }

    private void preventIllegalModeChange(Mode mode) throws IllegalCaptureReplayUsageException {
        // The current mode cannot be changed if the it is set to OFF.
        if (Mode.OFF.equals(this.mode) && !Mode.OFF.equals(mode)) {
            throw new IllegalCaptureReplayUsageException(
                    "Capturing/replaying is switched off. It is not allowed to enabled it at runtime.");
        } else if (!Mode.OFF.equals(this.mode) && Mode.OFF.equals(mode)) {
            throw new IllegalCaptureReplayUsageException(
                    "Capturing/replaying is switched on. It is not allowed to switch it off at runtime.");
        }
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        Validate.notNull(mode, "<capture-replay /> is used but no mode (off/capture/replay) has been set.");
        Validate.notNull(dataMapper, "<capture-replay /> is used but no data mapper has been set.");
    }

    public class IllegalCaptureReplayUsageException extends RuntimeException {
        public IllegalCaptureReplayUsageException(String message) {
            super(message);
        }
    }
}