diff -r 80ef3a206772 -r 48780e181b38 Symbian3/SDK/Source/GUID-8255A186-C1AC-44DA-844C-1FEA029C73BC.dita --- a/Symbian3/SDK/Source/GUID-8255A186-C1AC-44DA-844C-1FEA029C73BC.dita Fri Jul 16 17:23:46 2010 +0100 +++ b/Symbian3/SDK/Source/GUID-8255A186-C1AC-44DA-844C-1FEA029C73BC.dita Tue Jul 20 12:00:49 2010 +0100 @@ -1,36 +1,36 @@ - - - - - -Publish -and Subscribe -

Publish and Subscribe has replaced System Agent and the usage -of temporary Shared Data keys.

-

Publish and Subscribe allows the setting, retrieving and monitoring -of system-wide variables and provides a new inter process communication (IPC) -mechanism for peer to peer communication between threads. Threads may have -the role of the publisher or of the subscriber, while any thread can define -the property to be published. The process that defines a property can specify -access rights for both reading and writing. Rights can be defined in terms -of either requiring a particular capability, -by a process Secure -Identifier, or by a process VID.

-

Publish and Subscribe should be considered under any of the following -conditions:

- -

For more information about the use of Publish and Subscribe, see Using Publish and Subscribe.

+ + + + + +Publish and Subscribe +

Publish and Subscribe has replaced System Agent and the +usage of temporary Shared Data keys.

+

Publish and Subscribe allows the setting, retrieving and monitoring +of system-wide variables and provides a new inter process communication +(IPC) mechanism for peer to peer communication between threads. Threads +may have the role of the publisher or of the subscriber, while any +thread can define the property to be published. The process that defines +a property can specify access rights for both reading and writing. +Rights can be defined in terms of either requiring a particular capability, by a process Secure Identifier, or by a process VID.

+

Publish and Subscribe should be considered under any of the +following conditions:

+
    +
  • An event should be sent simultaneously to multiple +places over the system.

  • +
  • Only the last value of the property is significant, +not the intermediate values.

  • +
  • The source of the value is not significant. The value +may have been set by any publisher with proper rights.

    +
  • +
+

For more information about the use of Publish and Subscribe, +see Using Publish +and Subscribe.

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