org.apache.camel.component.consul.health.ConsulHealthCheckRepository Maven / Gradle / Ivy
/**
* 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.camel.component.consul.health;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.function.Supplier;
import java.util.stream.Stream;
import com.orbitz.consul.Consul;
import org.apache.camel.CamelContext;
import org.apache.camel.CamelContextAware;
import org.apache.camel.health.HealthCheck;
import org.apache.camel.health.HealthCheckConfiguration;
import org.apache.camel.health.HealthCheckRepository;
import org.apache.camel.health.HealthCheckResultBuilder;
import org.apache.camel.impl.health.AbstractHealthCheck;
import org.apache.camel.util.ObjectHelper;
import org.apache.camel.util.function.Suppliers;
public class ConsulHealthCheckRepository implements HealthCheckRepository, CamelContextAware {
private final Supplier client;
private final ConcurrentMap checks;
private ConsulHealthCheckRepositoryConfiguration configuration;
private CamelContext camelContext;
public ConsulHealthCheckRepository() {
this(null);
}
private ConsulHealthCheckRepository(ConsulHealthCheckRepositoryConfiguration configuration) {
this.checks = new ConcurrentHashMap<>();
this.configuration = configuration;
this.client = Suppliers.memorize(this::createConsul, ObjectHelper::wrapRuntimeCamelException);
}
// *************************************
//
// *************************************
public ConsulHealthCheckRepositoryConfiguration getConfiguration() {
return configuration;
}
public void setConfiguration(ConsulHealthCheckRepositoryConfiguration configuration) {
this.configuration = configuration;
}
@Override
public void setCamelContext(CamelContext camelContext) {
this.camelContext = camelContext;
}
@Override
public CamelContext getCamelContext() {
return camelContext;
}
@Override
public Stream stream() {
final Set ids = configuration.getChecks();
if (ObjectHelper.isNotEmpty(ids)) {
return ids.stream()
.map(checkId -> checks.computeIfAbsent(checkId, ConsulHealthCheck::new))
.filter(check -> check.getConfiguration().isEnabled());
}
return Stream.empty();
}
// *************************************
//
// *************************************
private Consul createConsul() throws Exception {
ConsulHealthCheckRepositoryConfiguration conf = configuration;
if (conf == null) {
conf = new ConsulHealthCheckRepositoryConfiguration();
}
return conf.createConsulClient(camelContext);
}
private class ConsulHealthCheck extends AbstractHealthCheck {
private final String checkId;
ConsulHealthCheck(String checkId) {
super("consul-" + checkId.replaceAll(":", "-"));
this.checkId = checkId;
HealthCheckConfiguration conf = configuration.getConfigurations().get(getId());
if (conf == null) {
conf = HealthCheckConfiguration.builder()
.complete(configuration.getDefaultConfiguration())
.build();
}
setConfiguration(conf);
}
@Override
protected void doCall(HealthCheckResultBuilder builder, Map options) {
builder.unknown();
com.orbitz.consul.model.health.HealthCheck check = client.get().agentClient().getChecks().get(checkId);
if (check != null) {
// From Consul sources:
// https://github.com/hashicorp/consul/blob/master/api/health.go#L8-L16
//
// States are:
//
// const (
// HealthAny is special, and is used as a wild card,
// not as a specific state.
// HealthAny = "any"
// HealthPassing = "passing"
// HealthWarning = "warning"
// HealthCritical = "critical"
// HealthMaint = "maintenance"
// )
if (ObjectHelper.equalIgnoreCase(check.getStatus(), "passing")) {
builder.up();
}
if (ObjectHelper.equalIgnoreCase(check.getStatus(), "warning")) {
builder.down();
}
if (ObjectHelper.equalIgnoreCase(check.getStatus(), "critical")) {
builder.down();
}
builder.detail("consul.service.name", check.getServiceName().orElse(null));
builder.detail("consul.service.id", check.getServiceId().orElse(null));
builder.detail("consul.check.status", check.getStatus());
builder.detail("consul.check.id", check.getCheckId());
}
}
}
// ****************************************
// Builder
// ****************************************
public static final class Builder implements org.apache.camel.Builder {
private HealthCheckConfiguration defaultConfiguration;
private Set checks;
private Map configurations;
public Builder configuration(HealthCheckConfiguration defaultConfiguration) {
this.defaultConfiguration = defaultConfiguration;
return this;
}
public Builder configuration(String id, HealthCheckConfiguration configuration) {
if (this.configurations == null) {
this.configurations = new HashMap<>();
}
this.configurations.put(id, configuration);
return this;
}
public Builder configurations(Map configurations) {
if (ObjectHelper.isNotEmpty(configurations)) {
configurations.forEach(this::configuration);
}
return this;
}
public Builder check(String id) {
if (ObjectHelper.isNotEmpty(id)) {
if (this.checks == null) {
this.checks = new HashSet<>();
}
this.checks.add(id);
}
return this;
}
public Builder checks(Collection ids) {
if (ObjectHelper.isNotEmpty(ids)) {
ids.forEach(this::check);
}
return this;
}
@Override
public ConsulHealthCheckRepository build() {
ConsulHealthCheckRepositoryConfiguration configuration = new ConsulHealthCheckRepositoryConfiguration();
configuration.setDefaultConfiguration(defaultConfiguration);
if (checks != null) {
checks.forEach(configuration::addCheck);
}
if (configurations != null) {
configurations.forEach(configuration::addConfiguration);
}
return new ConsulHealthCheckRepository(configuration);
}
}
}