Package com.google.appengine.tools.development

Class DevAppServerModulesCommon

java.lang.Object

com.google.appengine.tools.development.DevAppServerModulesCommon

Direct Known Subclasses:

DevAppServerModulesFilter, DevAppServerModulesFilter

public class DevAppServerModulesCommon
extends Object

This filter intercepts all request sent to all module instances.

There are 6 different request types that this filter will see:

* DIRECT_BACKEND_REQUEST: a client request sent to a serving (non load balancing) backend instance.

* REDIRECT_REQUESTED: a request requesting a redirect in one of three ways 1) The request contains a BackendService.REQUEST_HEADER_BACKEND_REDIRECT header or parameter 2) The request is sent to a load balancing module instance. 3) The request is sent to a load balancing backend instance.

If the request specifies an instance with the BackendService.REQUEST_HEADER_INSTANCE_REDIRECT request header or parameter the filter verifies that the instance is available, obtains a serving permit and forwards the requests. If the instance is not available the filter responds with a 500 error.

If the request does not specify an instance the filter picks one, obtains a serving permit, and forwards the request. If no instance is available this filter responds with a 500 error.

* DIRECT_MODULE_REQUEST: a request sent directly to the listening port of a specific serving module instance. The filter verifies that the instance is available, obtains a serving permit and sends the request to the handler. If no instance is available this filter responds with a 500 error.

* REDIRECTED_BACKEND_REQUEST: a request redirected to a backend instance. The filter sends the request to the handler. The serving permit has already been obtained by this filter when performing the redirect.

* REDIRECTED_MODULE_REQUEST: a request redirected to a specific module instance. The filter sends the request to the handler. The serving permit has already been obtained when by filter performing the redirect.

* STARTUP_REQUEST: Internally generated startup request. The filter passes the request to the handler without obtaining a serving permit.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	DevAppServerModulesCommon.RequestType

Constructor Summary

Constructors

Constructor	Description
DevAppServerModulesCommon()

Method Summary

Modifier and Type	Method	Description
static void	injectBackendServiceCurrentApiInfo(String backendName, int backendInstance, Map<String,String> portMapping)	Sets up ApiProxy attributes needed BackendService.

Methods inherited from class java.lang.Object

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

Constructor Details

DevAppServerModulesCommon

public DevAppServerModulesCommon()

Method Details

injectBackendServiceCurrentApiInfo

public static void injectBackendServiceCurrentApiInfo(String backendName,
 int backendInstance,
 Map<String,String> portMapping)

Sets up ApiProxy attributes needed BackendService.