Hiya My question really relates to asynchronous requests If Service1 sends an asynchronous request to Service2 The response from Service2 is placed on the Queue of Service1 But is it then up to Service1 to check its Queue for a reply? Or will Service1 receive the reply via its "acceptRequest" function?
Thanks ________________________________ From: Sharon Lucas <luc...@us.ibm.com> To: clayton neal <clayton_n...@yahoo.co.uk> Cc: staf-users@lists.sourceforge.net Sent: Tuesday, 30 June, 2009 22:23:28 Subject: Re: [staf-users] How to share memory between different services Whats the difference between a command request and a message on the QUEUE service? I'm not really sure what you mean. A STAF service request (aka command) is any request submitted to a STAF service. For example: STAF local QUEUE QUEUE MESSAGE "Hi" STAF local QUEUE GET WAIT 5000 STAF local DELAY DELAY 5s STAF local PING PING MESSAGE is an option on a QUEUE request submitted to the QUEUE service. For example: STAF local QUEUE QUEUE MESSAGE "Hi" Are commands requests put on the QUEUE automatically? No. I don't think you understand the QUEUE service. For more information on the QUEUE service, see the STAF User's Guide. Is it up to the service to process its own queue? A STAF service does not have to do anything with its service handle's queue. Note that every STAF handle has a queue associated with it as discussed in section "2.1 Handles" and section "2.6 Queues" in the STAF User's Guide at http://staf.sourceforge.net/current/STAFUG.htm#HDRHNDLCON. It defines a queue as "a priority queue used for interprocess communication between other processes/machines using STAF." Note, to get help on a STAF service's request syntax, you can submit a HELP request to the STAF service. For example, to get help on the syntax for QUEUE service requests: C:\>STAF local QUEUE HELP Response -------- QUEUE Service Help QUEUE MESSAGE <Message> [HANDLE <Handle>] | [NAME <Name>] [PRIORITY <Priority>] [TYPE <Type>] GET [PRIORITY <Priority>]... [MACHINE <Endpoint>]... [NAME <Name>]... [HANDLE <Handle>]... [USER <User>]... [TYPE <Type>]... [CONTAINS <String>]... [ICONTAINS <String>]... [FIRST <Number> | ALL] [WAIT [<Number>[s|m|h|d|w]]] PEEK [PRIORITY <Priority>]... [MACHINE <Endpoint>]... [NAME <Name>]... [HANDLE <Handle>]... [USER <User>]... [TYPE <Type>]... [CONTAINS <String>]... [ICONTAINS <String>]... [FIRST <Number> | ALL] [WAIT [<Number>[s|m|h|d|w]]] DELETE [PRIORITY <Priority>]... [MACHINE <Endpoint>]... [NAME <Name>]... [HANDLE <Handle>]... [USER <User>]... [TYPE <Type>]... [CONTAINS <String>]... [ICONTAINS <String>]... LIST [HANDLE <Handle>] HELP -------------------------------------------------------------- Sharon Lucas IBM Austin, luc...@us.ibm.com (512) 286-7313 or Tieline 363-7313 clayton neal <clayton_n...@yahoo.co.uk> 06/30/2009 04:03 PM To Sharon Lucas/Austin/i...@ibmus, Lu Yu <l...@vmware.com> cc staf-users@lists.sourceforge.net Subject Re: [staf-users] How to share memory between different services Hiya Ive a question... Whats the difference between a command request and a message on the QUEUE service? Are commands requests put on the QUEUE automatically? Is it up to the service to process its own queue? ________________________________ From: Sharon Lucas <luc...@us.ibm.com> To: Lu Yu <l...@vmware.com> Cc: staf-users@lists.sourceforge.net Sent: Tuesday, 30 June, 2009 19:45:45 Subject: Re: [staf-users] How to share memory between different services No, I don't think so. -------------------------------------------------------------- Sharon Lucas IBM Austin, luc...@us.ibm.com (512) 286-7313 or Tieline 363-7313 Lu Yu <l...@vmware.com> 06/30/2009 01:11 PM To Sharon Lucas/Austin/i...@ibmus cc Subject RE: [staf-users] How to share memory between different services That is what I want. Is there any sub service/ parent service that STAF framework can provide? Lu From: Sharon Lucas [mailto:luc...@us.ibm.com] Sent: Tuesday, June 30, 2009 11:03 AM To: Lu Yu Subject: RE: [staf-users] How to share memory between different services No, all STAF service request options are strings and all STAF service results are strings (e.g. no Java objects are passed -- though, you can create a marshalled data string that can consist of Strings, Lists, and Maps). Perhaps what you're really asking is a Java question, not a STAF question. How would you pass data from one Java application to another (without STAF involved)? -------------------------------------------------------------- Sharon Lucas IBM Austin, luc...@us.ibm.com (512) 286-7313 or Tieline 363-7313 Lu Yu <l...@vmware.com> 06/30/2009 12:58 PM To Sharon Lucas/Austin/i...@ibmus cc Subject RE: [staf-users] How to share memory between different services Sharon Connection anchor is just an example, it is a class object in the internal API..Never mind. So you mean that I can use STAF Queue service to pass any object from one service to another service? Thanks again! Lu From: Sharon Lucas [mailto:luc...@us.ibm.com] Sent: Tuesday, June 30, 2009 10:45 AM To: Lu Yu Cc: staf-users@lists.sourceforge.net Subject: RE: [staf-users] How to share memory between different services If you wanted to use STAF to send a message (containing whatever data you want from one STAF Java service/application to another), you could use the STAF QUEUE service and submit a QUEUE request to the QUEUE service to send a message to another STAF handle's queue. Then that STAF handle can submit a GET WAIT request to the QUEUE service on the local machine to get messages off its queue. I don't know what you mean by "create anchor". -------------------------------------------------------------- Sharon Lucas IBM Austin, luc...@us.ibm.com (512) 286-7313 or Tieline 363-7313 Lu Yu <l...@vmware.com> 06/30/2009 12:35 PM To Sharon Lucas/Austin/i...@ibmus cc "staf-users@lists.sourceforge.net" <staf-users@lists.sourceforge.net> Subject RE: [staf-users] How to share memory between different services Sharon Thanks for your reply. Here is what I want: We have 3 services implemented in STAF by Java: VM, Host, Setup. All these services have some common info such as connection anchor. But currently, when we use VM service, we have to create anchor for VM, using Host service, we need to create another anchor for Host. Ideally, these two anchors are same, but since VM and Host service are in different memory, we can not re-use VM anchor for Host service. We are now thinking of way to build a main (common) service which handles all the common information such as anchor across all services. When needed for other services, we will load them. But all the loaded services can share the same information in main service. Can you please let me know what is the best way to do it Thanks Lu From: Sharon Lucas [mailto:luc...@us.ibm.com] Sent: Tuesday, June 30, 2009 8:30 AM To: Lu Yu Cc: staf-users@lists.sourceforge.net Subject: Re: [staf-users] How to share memory between different services Are these STAF Java services you have written? Are you asking how to run them in the same JVM? If so, just make sure when the Java service is registered that they are all registered using the same JVMName option (which defaults to STAFJVM1 if OPTION JVMNAME=<JVMName> is not specified when registering a STAF Java service). If this isn't what you're asking, please provide more information on what you are trying to do. -------------------------------------------------------------- Sharon Lucas IBM Austin, luc...@us.ibm.com (512) 286-7313 or Tieline 363-7313 Lu Yu <l...@vmware.com> 06/30/2009 02:19 AM To "staf-users@lists.sourceforge.net" <staf-users@lists.sourceforge.net> cc Subject [staf-users] How to share memory between different services Hi I am running STAF Framework in VMware. I have a question regarding sharing memory between different services. The problem I have is that we have maintained 4 different staf services (vmware internally developed service). In order to reduce the file size and memory usuage, we want to have a main service which has all shared information, when needed loading other services, the service loaded later can re-use the shared information in the main service. Can anyone shed a light on me of how to implement it? Thanks! 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