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/*
 * 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.spi;

import java.util.Collection;
import java.util.concurrent.TimeUnit;

import org.apache.camel.CamelContextAware;
import org.apache.camel.LoggingLevel;
import org.apache.camel.Route;
import org.apache.camel.ServiceStatus;
import org.apache.camel.StaticService;

/**
 * Controller for managing the lifecycle of all the {@link Route}'s.
 */
public interface RouteController extends CamelContextAware, StaticService {

    /**
     * Gets the logging level used for logging route activity (such as starting and stopping routes). The default
     * logging level is DEBUG.
     */
    LoggingLevel getLoggingLevel();

    /**
     * Sets the logging level used for logging route activity (such as starting and stopping routes). The default
     * logging level is DEBUG.
     */
    void setLoggingLevel(LoggingLevel loggingLevel);

    /**
     * Whether this route controller is a regular or supervising controller.
     */
    boolean isSupervising();

    /**
     * Enables supervising {@link RouteController}.
     */
    SupervisingRouteController supervising();

    /**
     * Adapts this {@link org.apache.camel.spi.RouteController} to the specialized type.
     * 

* For example to adapt to SupervisingRouteController. * * @param type the type to adapt to * @return this {@link org.apache.camel.CamelContext} adapted to the given type */ T adapt(Class type); /** * Return the list of routes controlled by this controller. * * @return the list of controlled routes */ Collection getControlledRoutes(); /** * Starts all the routes which currently is not started. * * @throws Exception is thrown if a route could not be started for whatever reason */ void startAllRoutes() throws Exception; /** * Stops all the routes * * @throws Exception is thrown if a route could not be stopped for whatever reason */ void stopAllRoutes() throws Exception; /** * Stops and removes all the routes * * @throws Exception is thrown if a route could not be stopped or removed for whatever reason */ void removeAllRoutes() throws Exception; /** * Indicates whether the route controller is doing initial starting of the routes. */ boolean isStartingRoutes(); /** * Indicates if the route controller has routes that are currently unhealthy such as they have not yet been * successfully started, and if being supervised then the route can either be pending restarts or failed all restart * attempts and are exhausted. */ boolean hasUnhealthyRoutes(); /** * Reloads all the routes * * @throws Exception is thrown if a route could not be reloaded for whatever reason */ void reloadAllRoutes() throws Exception; /** * Indicates whether current thread is reloading route(s). *

* This can be useful to know by {@link LifecycleStrategy} or the likes, in case they need to react differently. * * @return true if current thread is reloading route(s), or false if not. */ boolean isReloadingRoutes(); /** * Returns the current status of the given route * * @param routeId the route id * @return the status for the route */ ServiceStatus getRouteStatus(String routeId); /** * Starts the given route if it has been previously stopped * * @param routeId the route id * @throws Exception is thrown if the route could not be started for whatever reason */ void startRoute(String routeId) throws Exception; /** * Stops the given route using {@link org.apache.camel.spi.ShutdownStrategy}. * * @param routeId the route id * @throws Exception is thrown if the route could not be stopped for whatever reason * @see #suspendRoute(String) */ void stopRoute(String routeId) throws Exception; /** * Stops and marks the given route as failed (health check is DOWN) due to a caused exception. * * @param routeId the route id * @param cause the exception that is causing this route to be stopped and marked as failed * @throws Exception is thrown if the route could not be stopped for whatever reason * @see #suspendRoute(String) */ void stopRoute(String routeId, Throwable cause) throws Exception; /** * Stops the given route using {@link org.apache.camel.spi.ShutdownStrategy} with a specified timeout. * * @param routeId the route id * @param timeout timeout * @param timeUnit the unit to use * @throws Exception is thrown if the route could not be stopped for whatever reason * @see #suspendRoute(String, long, java.util.concurrent.TimeUnit) */ void stopRoute(String routeId, long timeout, TimeUnit timeUnit) throws Exception; /** * Stops the given route using {@link org.apache.camel.spi.ShutdownStrategy} with a specified timeout and optional * abortAfterTimeout mode. * * @param routeId the route id * @param timeout timeout * @param timeUnit the unit to use * @param abortAfterTimeout should abort shutdown after timeout * @return true if the route is stopped before the timeout * @throws Exception is thrown if the route could not be stopped for whatever reason * @see #suspendRoute(String, long, java.util.concurrent.TimeUnit) */ boolean stopRoute(String routeId, long timeout, TimeUnit timeUnit, boolean abortAfterTimeout) throws Exception; /** * Suspends the given route using {@link org.apache.camel.spi.ShutdownStrategy}. *

* Suspending a route is more gently than stopping, as the route consumers will be suspended (if they support) * otherwise the consumers will be stopped. *

* By suspending the route services will be kept running (if possible) and therefore its faster to resume the route. *

* If the route does not support suspension the route will be stopped instead * * @param routeId the route id * @throws Exception is thrown if the route could not be suspended for whatever reason */ void suspendRoute(String routeId) throws Exception; /** * Suspends the given route using {@link org.apache.camel.spi.ShutdownStrategy} with a specified timeout. *

* Suspending a route is more gently than stopping, as the route consumers will be suspended (if they support) * otherwise the consumers will be stopped. *

* By suspending the route services will be kept running (if possible) and therefore its faster to resume the route. *

* If the route does not support suspension the route will be stopped instead * * @param routeId the route id * @param timeout timeout * @param timeUnit the unit to use * @throws Exception is thrown if the route could not be suspended for whatever reason */ void suspendRoute(String routeId, long timeout, TimeUnit timeUnit) throws Exception; /** * Resumes the given route if it has been previously suspended *

* If the route does not support suspension the route will be started instead * * @param routeId the route id * @throws Exception is thrown if the route could not be resumed for whatever reason */ void resumeRoute(String routeId) throws Exception; }





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