org.apache.servicecomb.it.ITUtils.java Source code

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Here is the source code for org.apache.servicecomb.it.ITUtils.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.it;

import java.util.Comparator;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.function.Function;
import java.util.stream.Collectors;

import org.apache.commons.lang3.reflect.MethodUtils;
import org.apache.servicecomb.core.SCBEngine;
import org.apache.servicecomb.core.SCBStatus;
import org.apache.servicecomb.foundation.common.event.EventManager;
import org.apache.servicecomb.serviceregistry.RegistryUtils;
import org.apache.servicecomb.serviceregistry.api.registry.MicroserviceInstance;
import org.apache.servicecomb.serviceregistry.consumer.MicroserviceVersionRule;
import org.apache.servicecomb.serviceregistry.task.event.PeriodicPullEvent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public final class ITUtils {
    private static final Logger LOGGER = LoggerFactory.getLogger(ITUtils.class);

    private ITUtils() {
    }

    public static void forceWait(TimeUnit timeUnit, long timeout) {
        try {
            timeUnit.sleep(timeout);
        } catch (InterruptedException e) {
            // eat the exception
        }
    }

    public static void waitBootFinished() {
        for (;;) {
            if (SCBEngine.getInstance().getStatus().equals(SCBStatus.UP)) {
                return;
            }

            forceWait(TimeUnit.MILLISECONDS, 100);
        }
    }

    public static Map<String, MicroserviceInstance> waitMicroserviceReadyAndLimit(String appId,
            String microserviceName, String strVersionRule, int minInstanceCount) {
        Map<String, MicroserviceInstance> instances = waitMicroserviceReady(appId, microserviceName, strVersionRule,
                minInstanceCount);
        return instances.values().stream().sorted(Comparator.comparing(MicroserviceInstance::getInstanceId))
                .limit(minInstanceCount)
                .collect(Collectors.toMap(MicroserviceInstance::getInstanceId, Function.identity()));
    }

    public static Map<String, MicroserviceInstance> waitMicroserviceReady(String appId, String microserviceName,
            String strVersionRule, int minInstanceCount) {
        LOGGER.info("waiting for microservice online. appId={}, name={}, minInstanceCount={}", appId,
                microserviceName, minInstanceCount);

        Map<String, MicroserviceInstance> instances;
        for (;;) {
            MicroserviceVersionRule microserviceVersionRule = RegistryUtils.getServiceRegistry().getAppManager()
                    .getOrCreateMicroserviceVersionRule(appId, microserviceName, strVersionRule);
            instances = microserviceVersionRule.getInstances();
            if (instances.size() >= minInstanceCount) {
                break;
            }

            LOGGER.info(
                    "waiting for microservice online. appId={}, name={}, expect minInstanceCount={}, real instanceCount={}.",
                    appId, microserviceName, minInstanceCount, instances.size());
            // pull at once
            EventManager.getEventBus().post(new PeriodicPullEvent());
            forceWait(TimeUnit.SECONDS, 1);
        }

        LOGGER.info("microservice already online. appId={}, name={}, instanceCount={}", appId, microserviceName,
                minInstanceCount);
        return instances;
    }

    public static void invokeExactStaticMethod(final Class<?>[] classes, final String methodName, Object... args) {
        for (Class<?> cls : classes) {
            invokeExactStaticMethod(cls, methodName, args);
        }
    }

    @SuppressWarnings("unchecked")
    public static <T> T invokeExactStaticMethod(final Class<?> cls, final String methodName, Object... args) {
        try {
            return (T) MethodUtils.invokeExactStaticMethod(cls, methodName, args);
        } catch (Throwable e) {
            throw new IllegalStateException(
                    String.format("Failed to invoke, class=%s, method=%s", cls.getName(), methodName), e);
        }
    }
}