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An implementation of the Camunda Connector Runtime based on Spring Zeebe.

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/*
 * Copyright Camunda Services GmbH and/or licensed to Camunda Services GmbH
 * under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright
 * ownership. Camunda licenses this file to you under the Apache License,
 * Version 2.0; 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.camunda.connector.runtime;

import io.camunda.zeebe.client.ZeebeClient;
import io.camunda.zeebe.client.api.response.BrokerInfo;
import io.camunda.zeebe.client.api.response.PartitionBrokerHealth;
import io.camunda.zeebe.client.api.response.PartitionInfo;
import java.util.Collection;
import java.util.Map;
import org.springframework.boot.actuate.health.AbstractHealthIndicator;
import org.springframework.boot.actuate.health.Health.Builder;

public class ZeebeHealthIndicator extends AbstractHealthIndicator {

  private final ZeebeClient zeebeClient;

  public ZeebeHealthIndicator(ZeebeClient zeebeClient) {
    this.zeebeClient = zeebeClient;
  }

  @Override
  protected void doHealthCheck(Builder builder) {
    var topology = zeebeClient.newTopologyRequest().send().join();
    var numBrokers = topology.getBrokers().size();
    boolean anyPartitionHealthy =
        topology.getBrokers().stream()
            .map(BrokerInfo::getPartitions)
            .flatMap(Collection::stream)
            .map(PartitionInfo::getHealth)
            .anyMatch(health -> health == PartitionBrokerHealth.HEALTHY);
    var details = Map.of("numBrokers", numBrokers, "anyPartitionHealthy", anyPartitionHealthy);
    if (numBrokers > 0 && anyPartitionHealthy) {
      builder.up().withDetails(details);
    } else {
      builder.down().withDetails(details);
    }
  }
}