org.forgerock.openig.handler.router

Class RouterHandler

java.lang.Object

org.forgerock.openig.handler.router.RouterHandler

All Implemented Interfaces:

Handler

public class RouterHandler
extends Object
implements Handler

Auto-configured DispatchHandler. It looks for route configuration files (very similar to the usual general config file) in a defined directory (by default it looks in config/routes/).

   
   {
     "name": "Router",
     "type": "Router",
     "config": {
       "directory": "/tmp/routes",
       "defaultHandler": "404NotFound",
       "scanInterval": 2 or "2 seconds"
     }
   }
   
 

Note that scanInterval can be defined in 2 ways :

• as an integer, which defines the number of seconds. If -1 (or any negative value) is provided, only an initial scan is performed at startup, synchronously.
• as a duration. If "disabled" or "zero" is provided, only an initial scan is performed at startup, synchronously.

In both cases, the default value is 10 seconds.

Since:

2.2

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	RouterHandler.Heaplet Creates and initializes a routing handler in a heap environment.

Constructor Summary

Constructors

Constructor and Description
RouterHandler(org.forgerock.openig.handler.router.RouteBuilder builder, org.forgerock.openig.handler.router.DirectoryMonitor directoryMonitor, MeterRegistry routerMeterRegistry) Builds a router that loads its configuration from the given directory.

Method Summary

Modifier and Type	Method and Description
void	deploy(String routeId, String routeName, JsonValue routeConfig) Deploy a route, meaning that it loads it but also stores it in a file.
Promise<Response,NeverThrowsException>	handle(Context context, Request request) Returns a Promise representing the asynchronous Response of the given request.
void	onChanges(org.forgerock.openig.handler.router.FileChangeSet changes) Notify that changes has been detected in the monitored directory.
void	stop() Stops this handler, shutting down and clearing all the managed routes.
JsonValue	undeploy(String routeId) Undeploy a route, meaning that it unloads it but also deletes the associated file.
void	update(String routeId, String routeName, JsonValue routeConfig) Update a route.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RouterHandler

public RouterHandler(org.forgerock.openig.handler.router.RouteBuilder builder,
                     org.forgerock.openig.handler.router.DirectoryMonitor directoryMonitor,
                     MeterRegistry routerMeterRegistry)

Builds a router that loads its configuration from the given directory.

Parameters:

builder - route builder

directoryMonitor - the directory monitor

routerMeterRegistry - The router's meter registry

Method Detail

stop

public void stop()

Stops this handler, shutting down and clearing all the managed routes.

deploy

public void deploy(String routeId,
                   String routeName,
                   JsonValue routeConfig)
            throws RouterHandlerException

Deploy a route, meaning that it loads it but also stores it in a file.

Parameters:

routeId - the id of the route to deploy

routeName - the name of the route to deploy

routeConfig - the configuration of the route to deploy

Throws:

RouterHandlerException - if the given routeConfig is not valid

undeploy

public JsonValue undeploy(String routeId)
                   throws RouterHandlerException

Undeploy a route, meaning that it unloads it but also deletes the associated file.

Parameters:

routeId - the id of the route to remove

Returns:

the configuration of the undeployed route

Throws:

RouterHandlerException - if the given routeId is not valid

update

public void update(String routeId,
                   String routeName,
                   JsonValue routeConfig)
            throws RouterHandlerException

Update a route.

Parameters:

routeId - the id of the route to update

routeName - the name of the route to update

routeConfig - the new route's configuration

Throws:

RouterHandlerException - if the given routeConfig is not valid

handle

public Promise<Response,NeverThrowsException> handle(Context context,
                                                     Request request)

Description copied from interface: Handler

Returns a Promise representing the asynchronous Response of the given request. If any (asynchronous) processing goes wrong, the promise still contains a Response (probably from the 4xx or 5xx status code family).

A handler that doesn't hand-off the processing to another downstream handler is responsible for creating the response.

The returned Promise contains the response returned from the server as-is. This is responsibility of the handler to produce the appropriate error response (404, 500, ...) in case of processing error.

Note: As of Promise 2.0 implementation, it is not permitted to throw any runtime exception here. Doing so produce unexpected behaviour (most likely a server-side hang of the processing thread).

Specified by:

handle in interface Handler

Parameters:

context - The request context.

request - The request.

Returns:

A Promise representing the response to be returned to the caller.

onChanges

public void onChanges(org.forgerock.openig.handler.router.FileChangeSet changes)

Notify that changes has been detected in the monitored directory.

Parameters:

changes - Content of the change set