io.alauda.devops.client.dsl.internal.DeploymentConfigOperationsImpl Maven / Gradle / Ivy

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/**
 * Copyright (C) 2018 Alauda
 *
 * 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 io.alauda.devops.client.dsl.internal;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
import java.util.TreeMap;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;

import io.alauda.kubernetes.client.KubernetesClientException;
import io.alauda.kubernetes.client.dsl.Reaper;
import io.alauda.kubernetes.client.dsl.internal.ReplicationControllerOperationsImpl;
import io.alauda.kubernetes.client.utils.Utils;
import io.fabric8.openshift.api.model.DeploymentConfig;
import io.fabric8.openshift.api.model.DeploymentConfigList;
import io.fabric8.openshift.api.model.DoneableDeploymentConfig;
import io.alauda.devops.client.AlaudaDevOpsConfig;
import io.alauda.devops.client.dsl.DeployableScalableResource;
import okhttp3.OkHttpClient;

import static io.alauda.devops.client.AlaudaAPIGroups.APPS;

public class DeploymentConfigOperationsImpl extends AlaudaOperation> implements DeployableScalableResource {

  private static final Logger LOG = LoggerFactory.getLogger(DeploymentConfigOperationsImpl.class);
  private static final String DEPLOYMENT_CONFIG_REF = "devops.io/deployment-config.name";


  public DeploymentConfigOperationsImpl(OkHttpClient client, AlaudaDevOpsConfig config, String namespace) {
    this(client, config, null, namespace, null, true, null, null, false, -1, new TreeMap(), new TreeMap(), new TreeMap(), new TreeMap(), new TreeMap());
  }

  public DeploymentConfigOperationsImpl(OkHttpClient client, AlaudaDevOpsConfig config, String apiVersion, String namespace, String name, Boolean cascading, DeploymentConfig item, String resourceVersion, Boolean reloadingFromServer, long gracePeriodSeconds, Map labels, Map labelsNot, Map labelsIn, Map labelsNotIn, Map fields) {
    super(client, AlaudaOperation.withApiGroup(client, APPS, apiVersion, config), "deploymentconfigs", namespace, name, cascading, item, resourceVersion, reloadingFromServer, gracePeriodSeconds, labels, labelsNot, labelsIn, labelsNotIn, fields);
    reaper = new DeploymentConfigReaper(this, client);
  }

  @Override
  public DoneableDeploymentConfig edit() {
    if (isCascading()) {
      return cascading(false).edit();
    }
    return super.edit();
  }

  @Override
  public DeploymentConfig replace(DeploymentConfig item) {
    if (isCascading()) {
      return cascading(false).replace(item);
    }
    return super.replace(item);
  }

  @Override
  public DeploymentConfig patch(DeploymentConfig item) {
    if (isCascading()) {
      return cascading(false).patch(item);
    }
    return super.patch(item);
  }

  @Override
  public DeploymentConfig deployLatest() {
    return deployLatest(false);
  }

  @Override
  public DeploymentConfig deployLatest(boolean wait) {
    Long currentVersion = getMandatory().getStatus().getLatestVersion();
    if(currentVersion == null){
      currentVersion = 1L;
    }
    DeploymentConfig deployment = cascading(false).edit().editStatus().withLatestVersion(++currentVersion).endStatus().done();
    if (wait) {
      waitUntilDeploymentConfigIsScaled(deployment.getSpec().getReplicas());
      deployment = getMandatory();
    }
    return deployment;
  }

  private static class DeploymentConfigReaper implements Reaper {

    private final DeploymentConfigOperationsImpl operation;
    private final OkHttpClient client;

    public DeploymentConfigReaper(DeploymentConfigOperationsImpl operation, OkHttpClient client) {
      this.operation = operation;
      this.client = client;
    }

    @Override
    public boolean reap() {
      DeploymentConfig deployment = operation.cascading(false).edit().editSpec().withReplicas(0).endSpec().done();

      //TODO: These checks shouldn't be used as they are not realistic. We just use them to support mock/crud tests. Need to find a cleaner way to do so.
      if (deployment.getStatus() != null) {
        waitForObservedGeneration(deployment.getStatus().getObservedGeneration());
      }

      //We are deleting the DC before reaping the replication controller, because the RC's won't go otherwise.
      Boolean reaped = operation.cascading(false).delete();

      Map selector = new HashMap<>();
      selector.put(DEPLOYMENT_CONFIG_REF, deployment.getMetadata().getName());
      if (selector != null && !selector.isEmpty()) {
        Boolean deleted = new ReplicationControllerOperationsImpl(client, operation.getConfig(), operation.getNamespace())
          .withLabels(selector)
          .delete();
      }

      return reaped;
    }

    private void waitForObservedGeneration(final long observedGeneration) {
      final CountDownLatch countDownLatch = new CountDownLatch(1);

      final Runnable deploymentPoller = new Runnable() {
        public void run() {
          DeploymentConfig deployment = operation.getMandatory();
          if (observedGeneration <= deployment.getStatus().getObservedGeneration()) {
            countDownLatch.countDown();
          }
        }
      };

      ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor();
      ScheduledFuture poller = executor.scheduleWithFixedDelay(deploymentPoller, 0, 10, TimeUnit.MILLISECONDS);
      try {
        countDownLatch.await(1, TimeUnit.MINUTES);
        executor.shutdown();
      } catch (InterruptedException e) {
        poller.cancel(true);
        executor.shutdown();
        throw KubernetesClientException.launderThrowable(e);
      }
    }
  }

  @Override
  public DeploymentConfig scale(int count) {
    return scale(count, false);
  }

  @Override
  public DeploymentConfig scale(int count, boolean wait) {
    DeploymentConfig deployment = cascading(false).edit().editSpec().withReplicas(count).endSpec().done();
    if (wait) {
      waitUntilDeploymentConfigIsScaled(count);
      deployment = getMandatory();
    }
    return deployment;
  }

  /**
   * Lets wait until there are enough Ready pods of the given Deployment
   */
  private void waitUntilDeploymentConfigIsScaled(final int count) {
    final BlockingQueue