gora-couchdb/src/test/java/org/apache/gora/couchdb/CouchDBStartupLogWaitStrategy.java

/*
 * 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.gora.couchdb;

import org.testcontainers.containers.ContainerLaunchException;
import org.testcontainers.containers.GenericContainer;
import org.testcontainers.containers.output.OutputFrame;
import org.testcontainers.containers.output.WaitingConsumer;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.function.Predicate;

/**
 * Log based CouchDB server startup wait strategy to sync server
 * startup to test suit startup.
 */
public class CouchDBStartupLogWaitStrategy extends GenericContainer.AbstractWaitStrategy {

  private static final String regEx = ".*Apache CouchDB has started. Time to relax..*";

  private int times = 1;

  protected void waitUntilReady() {
    WaitingConsumer waitingConsumer = new WaitingConsumer();
    this.container.followOutput(waitingConsumer);
    Predicate waitPredicate = (outputFrame) -> {
      String trimmedFrameText = ((OutputFrame) outputFrame)
              .getUtf8String()
              .replaceFirst("\n$", "");
      return trimmedFrameText.matches(regEx);
    };

    try {
      waitingConsumer.waitUntil(waitPredicate, this.startupTimeout.getSeconds(), TimeUnit.SECONDS,
              this.times);
    } catch (TimeoutException var4) {
      throw new ContainerLaunchException(
              "Timed out waiting for log output matching CouchDB server startup Log  \'" + regEx
                      + "\'");
    }
  }

}