Examples of org.apache.camel.spi.ExecutorServiceManager

org.apache.camel.spi.ExecutorServiceManager
Strategy to create thread pools.
This manager is pluggable so you can plugin a custom provider, for example if you want to leverage the WorkManager for a JEE server.
You may want to just implement a custom {@link ThreadPoolFactory} and rely on the{@link org.apache.camel.impl.DefaultExecutorServiceManager}, if that is sufficient. The {@link ThreadPoolFactory}is always used for creating the actual thread pools. You can implement a custom {@link ThreadPoolFactory}to leverage the WorkManager for a JEE server.
The {@link ThreadPoolFactory} has pure JDK API, where as this {@link ExecutorServiceManager} has Camel APIconcepts such as {@link ThreadPoolProfile}. Therefore it may be easier to only implement a custom {@link ThreadPoolFactory}.
This manager has fine grained methods for creating various thread pools, however custom strategies do not have to exactly create those kind of pools. Feel free to return a shared or different kind of pool.
If you use the newXXX methods to create thread pools, then Camel will by default take care of shutting down those created pools when {@link org.apache.camel.CamelContext} is shutting down.
@see ThreadPoolFactory

        // TODO: maybe rather than this one-off method to support an executorService & scheduledExecutorService for the aggregator,
        // create ScheduledExecutorServiceAwareDefinition and the change other definitions that currently use ScheduledExecutorServices to
        // use that one instead of the more generic ExecutorServiceAwareDefinition
        ScheduledExecutorService answer = routeContext.getCamelContext().getRegistry().lookup(timeoutCheckerExecutorServiceRef, ScheduledExecutorService.class);
        if (answer == null) {
            ExecutorServiceManager manager = routeContext.getCamelContext().getExecutorServiceManager();
            // then create a thread pool assuming the ref is a thread pool profile id                
            ThreadPoolProfile profile = manager.getThreadPoolProfile(timeoutCheckerExecutorServiceRef);
            if (profile != null) {
                // okay we need to grab the pool size from the ref
                Integer poolSize = profile.getPoolSize();
                if (poolSize == null) {
                    // fallback and use the default pool size, if none was set on the profile
                    poolSize = manager.getDefaultThreadPoolProfile().getPoolSize();
                }
                answer = manager.newScheduledThreadPool(this, "Aggregator", poolSize);
            }
        }
        return answer;
    }

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        if (executorService == null || executorService.isShutdown()) {
            // camel context will shutdown the executor when it shutdown so no need to shut it down when stopping
            if (executorServiceRef != null) {
                executorService = camelContext.getRegistry().lookup(executorServiceRef, ScheduledExecutorService.class);
                if (executorService == null) {
                    ExecutorServiceManager manager = camelContext.getExecutorServiceManager();
                    ThreadPoolProfile profile = manager.getThreadPoolProfile(executorServiceRef);
                    executorService = manager.newScheduledThreadPool(this, executorServiceRef, profile);
                }
                if (executorService == null) {
                    throw new IllegalArgumentException("ExecutorServiceRef " + executorServiceRef + " not found in registry.");
                }
            } else {

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        if (executorService == null || executorService.isShutdown()) {
            // camel context will shutdown the executor when it shutdown so no need to shut it down when stopping
            if (executorServiceRef != null) {
                executorService = camelContext.getRegistry().lookupByNameAndType(executorServiceRef, ScheduledExecutorService.class);
                if (executorService == null) {
                    ExecutorServiceManager manager = camelContext.getExecutorServiceManager();
                    ThreadPoolProfile profile = manager.getThreadPoolProfile(executorServiceRef);
                    executorService = manager.newScheduledThreadPool(this, executorServiceRef, profile);
                }
                if (executorService == null) {
                    throw new IllegalArgumentException("ExecutorServiceRef " + executorServiceRef + " not found in registry.");
                }
            } else {

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     * @param useDefault     whether to fallback and use a default thread pool, if no explicit configured
     * @return <tt>true</tt> if a new thread pool will be created, <tt>false</tt> if not
     * @see #getConfiguredExecutorService(org.apache.camel.spi.RouteContext, String, ExecutorServiceAwareDefinition, boolean)
     */
    public static boolean willCreateNewThreadPool(RouteContext routeContext, ExecutorServiceAwareDefinition<?> definition, boolean useDefault) {
        ExecutorServiceManager manager = routeContext.getCamelContext().getExecutorServiceManager();
        ObjectHelper.notNull(manager, "ExecutorServiceManager", routeContext.getCamelContext());
        
        if (definition.getExecutorService() != null) {
            // no there is a custom thread pool configured
            return false;

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     * @return the executor service, or <tt>null</tt> if none was found.
     */
    public static ExecutorService lookupExecutorServiceRef(RouteContext routeContext, String name,
                                                           Object source, String executorServiceRef) {


        ExecutorServiceManager manager = routeContext.getCamelContext().getExecutorServiceManager();
        ObjectHelper.notNull(manager, "ExecutorServiceManager", routeContext.getCamelContext());
        ObjectHelper.notNull(executorServiceRef, "executorServiceRef");


        // lookup in registry first and use existing thread pool if exists
        ExecutorService answer = routeContext.getCamelContext().getRegistry().lookupByNameAndType(executorServiceRef, ExecutorService.class);
        if (answer == null) {
            // then create a thread pool assuming the ref is a thread pool profile id
            answer = manager.newThreadPool(source, name, executorServiceRef);
        }
        return answer;
    }

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     * @throws IllegalArgumentException is thrown if lookup of executor service in {@link org.apache.camel.spi.Registry} was not found
     */
    public static ExecutorService getConfiguredExecutorService(RouteContext routeContext, String name,
                                                               ExecutorServiceAwareDefinition<?> definition,
                                                               boolean useDefault) throws IllegalArgumentException {
        ExecutorServiceManager manager = routeContext.getCamelContext().getExecutorServiceManager();
        ObjectHelper.notNull(manager, "ExecutorServiceManager", routeContext.getCamelContext());


        // prefer to use explicit configured executor on the definition
        if (definition.getExecutorService() != null) {
            return definition.getExecutorService();
        } else if (definition.getExecutorServiceRef() != null) {
            // lookup in registry first and use existing thread pool if exists
            ExecutorService answer = lookupExecutorServiceRef(routeContext, name, definition, definition.getExecutorServiceRef());
            if (answer == null) {
                throw new IllegalArgumentException("ExecutorServiceRef " + definition.getExecutorServiceRef() + " not found in registry or as a thread pool profile.");
            }
            return answer;
        } else if (useDefault) {
            return manager.newDefaultThreadPool(definition, name);
        }


        return null;
    }

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     * @return the executor service, or <tt>null</tt> if none was found.
     */
    public static ScheduledExecutorService lookupScheduledExecutorServiceRef(RouteContext routeContext, String name,
                                                                             Object source, String executorServiceRef) {


        ExecutorServiceManager manager = routeContext.getCamelContext().getExecutorServiceManager();
        ObjectHelper.notNull(manager, "ExecutorServiceManager", routeContext.getCamelContext());
        ObjectHelper.notNull(executorServiceRef, "executorServiceRef");


        // lookup in registry first and use existing thread pool if exists
        ScheduledExecutorService answer = routeContext.getCamelContext().getRegistry().lookupByNameAndType(executorServiceRef, ScheduledExecutorService.class);
        if (answer == null) {
            // then create a thread pool assuming the ref is a thread pool profile id
            answer = manager.newScheduledThreadPool(source, name, executorServiceRef);
        }
        return answer;
    }

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     * or lookup of executor service in {@link org.apache.camel.spi.Registry} was not found
     */
    public static ScheduledExecutorService getConfiguredScheduledExecutorService(RouteContext routeContext, String name,
                                                               ExecutorServiceAwareDefinition<?> definition,
                                                               boolean useDefault) throws IllegalArgumentException {
        ExecutorServiceManager manager = routeContext.getCamelContext().getExecutorServiceManager();
        ObjectHelper.notNull(manager, "ExecutorServiceManager", routeContext.getCamelContext());


        // prefer to use explicit configured executor on the definition
        if (definition.getExecutorService() != null) {
            ExecutorService executorService = definition.getExecutorService();
            if (executorService instanceof ScheduledExecutorService) {
                return (ScheduledExecutorService) executorService;
            }
            throw new IllegalArgumentException("ExecutorServiceRef " + definition.getExecutorServiceRef() + " is not an ScheduledExecutorService instance");
        } else if (definition.getExecutorServiceRef() != null) {
            ScheduledExecutorService answer = lookupScheduledExecutorServiceRef(routeContext, name, definition, definition.getExecutorServiceRef());
            if (answer == null) {
                throw new IllegalArgumentException("ExecutorServiceRef " + definition.getExecutorServiceRef() + " not found in registry or as a thread pool profile.");
            }
            return answer;
        } else if (useDefault) {
            return manager.newDefaultScheduledThreadPool(definition, name);
        }


        return null;
    }

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     * @param useDefault     whether to fallback and use a default thread pool, if no explicit configured
     * @return <tt>true</tt> if a new thread pool will be created, <tt>false</tt> if not
     * @see #getConfiguredExecutorService(org.apache.camel.spi.RouteContext, String, ExecutorServiceAwareDefinition, boolean)
     */
    public static boolean willCreateNewThreadPool(RouteContext routeContext, ExecutorServiceAwareDefinition<?> definition, boolean useDefault) {
        ExecutorServiceManager manager = routeContext.getCamelContext().getExecutorServiceManager();
        ObjectHelper.notNull(manager, "ExecutorServiceManager", routeContext.getCamelContext());
        
        if (definition.getExecutorService() != null) {
            // no there is a custom thread pool configured
            return false;

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     * @return the executor service, or <tt>null</tt> if none was found.
     */
    public static ExecutorService lookupExecutorServiceRef(RouteContext routeContext, String name,
                                                           Object source, String executorServiceRef) {


        ExecutorServiceManager manager = routeContext.getCamelContext().getExecutorServiceManager();
        ObjectHelper.notNull(manager, "ExecutorServiceManager", routeContext.getCamelContext());
        ObjectHelper.notNull(executorServiceRef, "executorServiceRef");


        // lookup in registry first and use existing thread pool if exists
        ExecutorService answer = routeContext.getCamelContext().getRegistry().lookupByNameAndType(executorServiceRef, ExecutorService.class);
        if (answer == null) {
            // then create a thread pool assuming the ref is a thread pool profile id
            answer = manager.newThreadPool(source, name, executorServiceRef);
        }
        return answer;
    }

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