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Ice::Communicator

Overview

local interface Communicator

The central object in Ice. One or more communicators can be instantiated for an Ice application. Communicator instantiation is language-specific, and not specified in Slice code.

Used By

::Freeze::Connection::getCommunicator
::IceBox::Service::start
ObjectAdapter::getCommunicator

See Also

Logger
Stats
ObjectAdapter
Properties
ObjectFactory

Operation Index

destroy
Destroy the communicator.
shutdown
Shuts down this communicator's server functionality, which includes the deactivation of all object adapters.
waitForShutdown
Wait until the application has called shutdown (or destroy).
isShutdown
Check whether communicator has been shut down.
stringToProxy
Convert a string into a proxy.
proxyToString
Convert a proxy into a string.
propertyToProxy
Convert a set of proxy properties into a proxy.
stringToIdentity
Convert a string into an identity.
identityToString
Convert an identity into a string.
createObjectAdapter
Create a new object adapter.
createObjectAdapterWithEndpoints
Create a new object adapter with endpoints.
createObjectAdapterWithRouter
Create a new object adapter with a router.
addObjectFactory
Add a servant factory to this communicator.
findObjectFactory
Find a servant factory registered with this communicator.
getDefaultContext
Get the currently-set default context.

Deprecated.

setDefaultContext
Set a default context on this communicator.

Deprecated.

getImplicitContext
Get the implicit context associated with this communicator.
getProperties
Get the properties for this communicator.
getLogger
Get the logger for this communicator.
getStats
Get the statistics callback object for this communicator.
getDefaultRouter
Get the default router this communicator.
setDefaultRouter
Set a default router for this communicator.
getDefaultLocator
Get the default locator this communicator.
setDefaultLocator
Set a default Ice locator for this communicator.
getPluginManager
Get the plug-in manager for this communicator.
flushBatchRequests
Flush any pending batch requests for this communicator.
getAdmin
Get a proxy to the main facet of the Admin object.
addAdminFacet
Add a new facet to the Admin object.
removeAdminFacet
Remove the following facet to the Admin object.

Operations

void destroy()

Destroy the communicator. This operation calls shutdown implicitly. Calling destroy cleans up memory, and shuts down this communicator's client functionality and destroys all object adapters. Subsequent calls to destroy are ignored.

See Also

shutdown
ObjectAdapter::destroy

void shutdown()

Shuts down this communicator's server functionality, which includes the deactivation of all object adapters. (Attempts to use a deactivated object adapter raise ObjectAdapterDeactivatedException.) Subsequent calls to shutdown are ignored.

After shutdown returns, no new requests are processed. However, requests that have been started before shutdown was called might still be active. You can use waitForShutdown to wait for the completion of all requests.

See Also

destroy
waitForShutdown
ObjectAdapter::deactivate

void waitForShutdown()

Wait until the application has called shutdown (or destroy). On the server side, this operation blocks the calling thread until all currently-executing operations have completed. On the client side, the operation simply block until another thread has called shutdown or destroy.

A typical use of this operation is to call it from the main thread, which then waits until some other thread calls shutdown. After shut-down is complete, the main thread returns and can do some cleanup work before it finally calls destroy to shut down the client functionality, and then exits the application.

See Also

shutdown
destroy
ObjectAdapter::waitForDeactivate

bool isShutdown()

Check whether communicator has been shut down.

Return Value

True if the communicator has been shut down; false otherwise.

See Also

shutdown

Object* stringToProxy(string str)

Convert a string into a proxy. For example, MyCategory/MyObject:tcp -h some_host -p 10000 creates a proxy that refers to the Ice object having an identity with a name "MyObject" and a category "MyCategory", with the server running on host "some_host", port 10000. If the string does not parse correctly, the operation throws ProxyParseException.

Parameters

str
The string to convert into a proxy.

Return Value

The proxy.

See Also

proxyToString

string proxyToString(Object* obj)

Convert a proxy into a string.

Parameters

obj
The proxy to convert into a string.

Return Value

The "stringified" proxy.

See Also

stringToProxy

Object* propertyToProxy(string property)

Convert a set of proxy properties into a proxy.

Parameters

property
The base property name.

Return Value

The proxy.

Identity stringToIdentity(string str)

Convert a string into an identity.

Parameters

str
The string to convert into an identity.

Return Value

The identity.

See Also

identityToString

string identityToString(Identity ident)

Convert an identity into a string.

Parameters

ident
The identity to convert into a string.

Return Value

The "stringified" identity.

See Also

stringToIdentity

ObjectAdapter createObjectAdapter(string name)

Create a new object adapter. The endpoints for the object adapter are taken from the property name.Endpoints.

It is legal to create an object adapter with the empty string as its name. Such an object adapter cannot be accessed remotely and, therefore, is accessible only for collocated invocations that originate from the the same communicator as is used by the adapter.

Attempts to create a named object adapter for which no endpoint or router configuration can be found raise InitializationException.

Parameters

name
The object adapter name.

Return Value

The new object adapter.

See Also

createObjectAdapterWithEndpoints
ObjectAdapter
Properties

ObjectAdapter createObjectAdapterWithEndpoints(string name, string endpoints)

Create a new object adapter with endpoints. This operation sets the property name.Endpoints, and then calls createObjectAdapter. It is provided as a convenience function.

Calling this operation with an empty name or empty endpoint string raises InitializationException.

Parameters

name
The object adapter name.
endpoints
The endpoints for the object adapter.

Return Value

The new object adapter.

See Also

createObjectAdapter
ObjectAdapter
Properties

ObjectAdapter createObjectAdapterWithRouter(string name, Router* rtr)

Create a new object adapter with a router. This operation creates a routed object adapter.

Parameters

name
The object adapter name.
router
The router.

Return Value

The new object adapter.

See Also

createObjectAdapter
ObjectAdapter
Properties

void addObjectFactory(ObjectFactory factory, string id)

Add a servant factory to this communicator. Installing a factory with an id for which a factory is already registered throws AlreadyRegisteredException.

When unmarshaling an Ice object, the Ice run-time reads the most-derived type id off the wire and attempts to create an instance of the type using a factory. If no instance is created, either because no factory was found, or because all factories returned nil, the object is sliced to the next most-derived type and the process repeats. If no factory is found that can create an instance, the Ice run-time throws NoObjectFactoryException.

The following order is used to locate a factory for a type:

  1. The Ice run-time looks for a factory registered specifically for the type.
  2. If no instance has been created, the Ice run-time looks for the default factory, which is registered with an emtpy type id.
  3. If no instance has been created by any of the preceding steps, the Ice run-time looks for a factory that may have been statically generated by the language mapping for non-abstract classes.

Parameters

factory
The factory to add.
id
The type id for which the factory can create instances, or an empty string for the default factory.

See Also

findObjectFactory
ObjectFactory

ObjectFactory findObjectFactory(string id)

Find a servant factory registered with this communicator.

Parameters

id
The type id for which the factory can create instances, or an empty string for the default factory.

Return Value

The servant factory, or null if no servant factory was found for the given id.

See Also

addObjectFactory
ObjectFactory

Context getDefaultContext()

Get the currently-set default context.

This operation is deprecated as of version 3.2.

getDefaultContext is deprecated, use per-proxy contexts or implicit contexts (if applicable) instead.

Return Value

The currently established default context. If no default context is currently set, getDefaultContext returns an empty context.

See Also

setDefaultContext

void setDefaultContext(Context ctx)

Set a default context on this communicator. All newly created proxies will use this default context. This operation has no effect on existing proxies.

You can also set a context for an individual proxy by calling the operation ice_context on the proxy.

This operation is deprecated as of version 3.2.

setDefaultContext is deprecated, use per-proxy contexts or implicit contexts (if applicable) instead.

Parameters

ctx
The default context to be set.

See Also

getDefaultContext

ImplicitContext getImplicitContext()

Get the implicit context associated with this communicator.

Return Value

The implicit context associated with this communicator; returns null when the property Ice.ImplicitContext is not set or is set to None.

Properties getProperties()

Get the properties for this communicator.

Return Value

This communicator's properties.

See Also

Properties

Logger getLogger()

Get the logger for this communicator.

Return Value

This communicator's logger.

See Also

Logger

Stats getStats()

Get the statistics callback object for this communicator.

Return Value

This communicator's statistics callback object.

See Also

Stats

Router* getDefaultRouter()

Get the default router this communicator.

Return Value

The default router for this communicator.

See Also

setDefaultRouter
Router

void setDefaultRouter(Router* rtr)

Set a default router for this communicator. All newly created proxies will use this default router. To disable the default router, null can be used. Note that this operation has no effect on existing proxies.

You can also set a router for an individual proxy by calling the operation ice_router on the proxy.

Parameters

rtr
The default router to use for this communicator.

See Also

getDefaultRouter
createObjectAdapterWithRouter
Router

Locator* getDefaultLocator()

Get the default locator this communicator.

Return Value

The default locator for this communicator.

See Also

setDefaultLocator
Locator

void setDefaultLocator(Locator* loc)

Set a default Ice locator for this communicator. All newly created proxy and object adapters will use this default locator. To disable the default locator, null can be used. Note that this operation has no effect on existing proxies or object adapters.

You can also set a locator for an individual proxy by calling the operation ice_locator on the proxy, or for an object adapter by calling the operation setLocator on the object adapter.

Parameters

loc
The default locator to use for this communicator.

See Also

getDefaultLocator
Locator
ObjectAdapter::setLocator

PluginManager getPluginManager()

Get the plug-in manager for this communicator.

Return Value

This communicator's plug-in manager.

See Also

PluginManager

void flushBatchRequests()

Flush any pending batch requests for this communicator. This causes all batch requests that were sent via proxies obtained via this communicator to be sent to the server.

Object* getAdmin()

Get a proxy to the main facet of the Admin object. When Ice.Admin.DelayCreation is greater than 0, it is necessary to call getAdmin() after the communicator is initialized to create the Admin object. Otherwise, the Admin object is created automatically after all the plug-ins are initialized.

Return Value

The main ("") facet of the Admin object; a null proxy if no Admin object is configured.

void addAdminFacet(Object servant, string facet)

Add a new facet to the Admin object. Adding a servant with a facet that is already registered throws AlreadyRegisteredException.

Parameters

servant
The servant that implements the new Admin facet.
facet
The new Admin facet.

Object removeAdminFacet(string facet)

Remove the following facet to the Admin object. Removing a facet that was not previously registered throws NotRegisteredException.

Parameters

facet
The Admin facet.

Return Value

The servant associated with this Admin facet


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