content: /*
   * 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.kafka.trogdor.common;
  
  import org.apache.kafka.test.TestUtils;
  import org.apache.kafka.trogdor.agent.AgentClient;
  import org.apache.kafka.trogdor.coordinator.CoordinatorClient;
  import org.apache.kafka.trogdor.rest.AgentStatusResponse;
  import org.apache.kafka.trogdor.rest.TaskState;
  import org.apache.kafka.trogdor.rest.TasksRequest;
  import org.apache.kafka.trogdor.rest.TasksResponse;
  import org.apache.kafka.trogdor.rest.WorkerState;
  import org.apache.kafka.trogdor.task.TaskSpec;
  
  import com.fasterxml.jackson.annotation.JsonCreator;
  import com.fasterxml.jackson.annotation.JsonProperty;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Optional;
  import java.util.TreeMap;
  
  public class ExpectedTasks {
      private static final Logger log = LoggerFactory.getLogger(ExpectedTasks.class);
  
      private final TreeMap<String, ExpectedTask> expected = new TreeMap<>();
  
      public static class ExpectedTaskBuilder {
          private final String id;
          private TaskSpec taskSpec = null;
          private TaskState taskState = null;
          private WorkerState workerState = null;
  
          public ExpectedTaskBuilder(String id) {
              this.id = id;
          }
  
          public ExpectedTaskBuilder taskSpec(TaskSpec taskSpec) {
              this.taskSpec = taskSpec;
              return this;
          }
  
          public ExpectedTaskBuilder taskState(TaskState taskState) {
              this.taskState = taskState;
              return this;
          }
  
          public ExpectedTaskBuilder workerState(WorkerState workerState) {
              this.workerState = workerState;
              return this;
          }
  
          public ExpectedTask build() {
              return new ExpectedTask(id, taskSpec, taskState, workerState);
          }
      }
  
      public static class ExpectedTask {
          private final String id;
          private final TaskSpec taskSpec;
          private final TaskState taskState;
          private final WorkerState workerState;
  
          @JsonCreator
          private ExpectedTask(@JsonProperty("id") String id,
                       @JsonProperty("taskSpec") TaskSpec taskSpec,
                       @JsonProperty("taskState") TaskState taskState,
                       @JsonProperty("workerState") WorkerState workerState) {
              this.id = id;
              this.taskSpec = taskSpec;
              this.taskState = taskState;
              this.workerState = workerState;
          }
  
          String compare(TaskState actual) {
              if (actual == null) {
                  return "Did not find task " + id + "\n";
              }
              if ((taskSpec != null) && (!actual.spec().equals(taskSpec))) {
                  return "Invalid spec for task " + id + ": expected " + taskSpec +
                      ", got " + actual.spec();
              }
              if ((taskState != null) && (!actual.equals(taskState))) {
                  return "Invalid state for task " + id + ": expected " + taskState +
                      ", got " + actual;
              }
              return null;
          }
  
          String compare(WorkerState actual) {
              if ((workerState != null) && (!workerState.equals(actual))) {
                  if (actual == null) {
                      return "Did not find worker " + id + "\n";
                  }
                  return "Invalid state for task " + id + ": expected " + workerState +
                      ", got " + actual;
              }
              return null;
          }
  
          @JsonProperty
          public String id() {
              return id;
          }
  
          @JsonProperty
          public TaskSpec taskSpec() {
              return taskSpec;
          }
  
          @JsonProperty
          public TaskState taskState() {
              return taskState;
          }
  
          @JsonProperty
          public WorkerState workerState() {
              return workerState;
          }
      }
  
      public ExpectedTasks addTask(ExpectedTask task) {
          expected.put(task.id, task);
          return this;
      }
  
      public ExpectedTasks waitFor(final CoordinatorClient client) throws InterruptedException {
          TestUtils.waitForCondition(() -> {
              TasksResponse tasks;
              try {
                  tasks = client.tasks(new TasksRequest(null, 0, 0, 0, 0, Optional.empty()));
              } catch (Exception e) {
                  log.info("Unable to get coordinator tasks", e);
                  throw new RuntimeException(e);
              }
              StringBuilder errors = new StringBuilder();
              for (Map.Entry<String, ExpectedTask> entry : expected.entrySet()) {
                  String id = entry.getKey();
                  ExpectedTask task = entry.getValue();
                  String differences = task.compare(tasks.tasks().get(id));
                  if (differences != null) {
                      errors.append(differences);
                  }
              }
              String errorString = errors.toString();
              if (!errorString.isEmpty()) {
                  log.info("EXPECTED TASKS: {}", JsonUtil.toJsonString(expected));
                  log.info("ACTUAL TASKS  : {}", JsonUtil.toJsonString(tasks.tasks()));
                  log.info(errorString);
                  return false;
              }
              return true;
          }, "Timed out waiting for expected tasks " + JsonUtil.toJsonString(expected));
          return this;
      }
  
      public ExpectedTasks waitFor(final AgentClient client) throws InterruptedException {
          TestUtils.waitForCondition(() -> {
              AgentStatusResponse status;
              try {
                  status = client.status();
              } catch (Exception e) {
                  log.info("Unable to get agent status", e);
                  throw new RuntimeException(e);
              }
              StringBuilder errors = new StringBuilder();
              HashMap<String, WorkerState> taskIdToWorkerState = new HashMap<>();
              for (WorkerState state : status.workers().values()) {
                  taskIdToWorkerState.put(state.taskId(), state);
              }
              for (Map.Entry<String, ExpectedTask> entry : expected.entrySet()) {
                  String id = entry.getKey();
                  ExpectedTask worker = entry.getValue();
                  String differences = worker.compare(taskIdToWorkerState.get(id));
                  if (differences != null) {
                      errors.append(differences);
                  }
              }
              String errorString = errors.toString();
              if (!errorString.isEmpty()) {
                  log.info("EXPECTED WORKERS: {}", JsonUtil.toJsonString(expected));
                  log.info("ACTUAL WORKERS  : {}", JsonUtil.toJsonString(status.workers()));
                  log.info(errorString);
                  return false;
              }
              return true;
          }, "Timed out waiting for expected workers " + JsonUtil.toJsonString(expected));
          return this;
      }
  }
  