| // Copyright (C) 2020 The Android Open Source Project |
| // |
| // 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 com.googlesource.gerrit.plugins.healthcheck.check; |
| |
| import static com.googlesource.gerrit.plugins.healthcheck.check.HealthCheckNames.DEADLOCK; |
| |
| import com.codahale.metrics.MetricRegistry; |
| import com.google.common.util.concurrent.ListeningExecutorService; |
| import com.google.inject.Inject; |
| import com.googlesource.gerrit.plugins.healthcheck.HealthCheckConfig; |
| import com.googlesource.gerrit.plugins.healthcheck.HealthCheckMetrics; |
| import java.util.Optional; |
| |
| public class DeadlockCheck extends AbstractHealthCheck { |
| |
| public static final String DEADLOCKED_THREADS_METRIC_NAME = |
| "proc/jvm/thread/num_deadlocked_threads"; |
| |
| private final MetricRegistry metricRegistry; |
| |
| @Inject |
| public DeadlockCheck( |
| ListeningExecutorService executor, |
| HealthCheckConfig healthCheckConfig, |
| MetricRegistry metricRegistry, |
| HealthCheckMetrics.Factory healthCheckMetricsFactory) { |
| super(executor, healthCheckConfig, DEADLOCK, healthCheckMetricsFactory); |
| this.metricRegistry = metricRegistry; |
| } |
| |
| @Override |
| protected Result doCheck() throws Exception { |
| return Optional.ofNullable(metricRegistry.getGauges().get(DEADLOCKED_THREADS_METRIC_NAME)) |
| .map( |
| metric -> { |
| return (int) metric.getValue() == 0 ? Result.PASSED : Result.FAILED; |
| }) |
| .orElse(Result.PASSED); |
| } |
| } |