org.apache.servicecomb.faultinjection.DelayFault.java Source code

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Here is the source code for org.apache.servicecomb.faultinjection.DelayFault.java

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/*
 * 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.servicecomb.faultinjection;

import org.apache.servicecomb.core.Invocation;
import org.apache.servicecomb.swagger.invocation.AsyncResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import io.vertx.core.Vertx;

public class DelayFault extends AbstractFault {
    private static final Logger LOGGER = LoggerFactory.getLogger(DelayFault.class);

    @Override
    public int getOrder() {
        return 100;
    }

    @Override
    public void injectFault(Invocation invocation, FaultParam faultParam, AsyncResponse asynResponse) {
        if (!shouldDelay(invocation, faultParam, asynResponse)) {
            asynResponse.success(SUCCESS_RESPONSE);
            return;
        }

        LOGGER.debug("Fault injection: delay is added for the request by fault inject handler");
        long delay = FaultInjectionUtil.getFaultInjectionConfig(invocation, "delay.fixedDelay");
        if (delay == FaultInjectionConst.FAULT_INJECTION_DEFAULT_VALUE) {
            LOGGER.debug("Fault injection: delay is not configured");
            asynResponse.success(SUCCESS_RESPONSE);
            return;
        }

        executeDelay(faultParam, asynResponse, delay);
    }

    private void executeDelay(FaultParam faultParam, AsyncResponse asynResponse, long delay) {
        Vertx vertx = faultParam.getVertx();
        if (vertx != null) {
            vertx.setTimer(delay, timeID -> asynResponse.success(SUCCESS_RESPONSE));
            return;
        }

        try {
            Thread.sleep(delay);
        } catch (InterruptedException e) {
            LOGGER.info("Interrupted exception is received");
        }
        asynResponse.success(SUCCESS_RESPONSE);
    }

    private boolean shouldDelay(Invocation invocation, FaultParam faultParam, AsyncResponse asynResponse) {
        int delayPercent = FaultInjectionUtil.getFaultInjectionConfig(invocation, "delay.percent");
        if (delayPercent == FaultInjectionConst.FAULT_INJECTION_DEFAULT_VALUE) {
            LOGGER.debug("Fault injection: delay percentage is not configured");
            return false;
        }

        // check fault delay condition.
        return FaultInjectionUtil.isFaultNeedToInject(faultParam.getReqCount(), delayPercent);
    }
}