/*
* 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 gobblin.runtime.api;
import com.google.common.util.concurrent.Service;
import com.typesafe.config.Config;
import com.typesafe.config.ConfigFactory;
import gobblin.annotation.Alpha;
import lombok.Getter;
/**
* Main class instantiated by the JVM or running framework. Reads application level
* configurations, instantiates and runs the Gobblin instance driver.
*/
@Alpha
public interface GobblinInstanceLauncher extends Service, Configurable, GobblinInstanceEnvironment {
/**
* Creates a new Gobblin instance to run Gobblin jobs.
* @throws IllegalStateException if {@link #isRunning()} is false.*/
GobblinInstanceDriver getDriver() throws IllegalStateException;
// Standard configuration for Gobblin instances
@Getter
public static class ConfigAccessor {
static final String RESOURCE_NAME =
GobblinInstanceLauncher.class.getPackage().getName().replaceAll("[.]", "/")
+ "/"
+ GobblinInstanceLauncher.class.getSimpleName()
+ ".conf";
/** The namespace for all config options */
static final String CONFIG_PREFIX = "gobblin.instance";
/** The time to wait for gobblin instance components to start in milliseconds. */
static final String START_TIMEOUT_MS = "startTimeoutMs";
/** The time wait for Gobblin components to shutdown in milliseconds. */
static final String SHUTDOWN_TIMEOUT_MS = "shutdownTimeoutMs";
private final long startTimeoutMs;
private final long shutdownTimeoutMs;
/** Config accessor from a no namespaced typesafe config. */
public ConfigAccessor(Config cfg) {
Config effectiveCfg = cfg.withFallback(getDefaultConfig().getConfig(CONFIG_PREFIX));
this.startTimeoutMs = effectiveCfg.getLong(START_TIMEOUT_MS);
this.shutdownTimeoutMs = effectiveCfg.getLong(SHUTDOWN_TIMEOUT_MS);
}
public static Config getDefaultConfig() {
return ConfigFactory.parseResources(GobblinInstanceLauncher.class,
GobblinInstanceLauncher.class.getSimpleName() + ".conf").withFallback(ConfigFactory.load());
}
public static ConfigAccessor createFromGlobalConfig(Config cfg) {
Config localCfg = cfg.hasPath(CONFIG_PREFIX) ? cfg.getConfig(CONFIG_PREFIX) :
ConfigFactory.empty();
return new ConfigAccessor(localCfg);
}
}
}