Communication Channal

Hi All,
I am creating the IDOC to FILE scenerio. Business system is ready but in ID I am not able to create the communication Channel. Can anybody please help me in creating it.

Hi,
For Idoc--File scenario , you dont require any Sender CC and Sender agreement at all.
Just create the Receiver File CC with the Receiver Business system OR Business Service
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/e07dcaa0-a92b-2a10-3a96-b3d942bd1539
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/73527b2c-0501-0010-5398-c4ac372c9692
REgards
Seshagiri

Similar Messages

Hi Friends, communicational channal is disappear in RWB

1) In sender file adaptor we configure the communicational channal and processing mode is Delete, interface is working fine.but I changed the processing mode is TEST.but its not working and i checked RWB ,its disappear the the communication channal.
where i need to check the problem .please suggest me the correct answer.
Thanks
Maruti.

Hello maruticg,
In Integration Directory, ensure that the CC is "active".
Regards,
Caio.

Sender MDM PI Adapter Communication Channal Problem

Hi All,
I am doing (MDM >PI>R/3) Material Master Outbound scenario; while doing syndication process xml file is generated in MDM ready folder.
But, in ths PI system RWB Communitation channel monitoring each time (wheneve new file placed in Ready folder) the MDM PI Adapter Communication Channel has to stop and start it then only the latest file is picking up.
How to solve this problem without doing start and stop the Communication Channel?
Plaase, help me to solve this issue.
Thanks in Advance
Best Regards
Mahesh

Hi Mahesh,
communication channel is controlled in 3 different methods Manual, Automatic and External (HTTP request)
so looking at your channel behaviour i suspect it's set to 'Manual'. If so please chage the control to 'Automatic'.
Manual - You control the communication channel by choosing Start or Stop.
Automatic - The communication channel is controlled by scheduled availability times.
I hope this hleps you.
Regards
Sekhar

What is path that is given while configuring communication channels

I had recently installed xi on my desktop, i'm unable to write path for communication channel....
while practicing in my institute I had used "//ECCserver/SAPMNT" as path for both sender and reciever communication channels...
now i'm unable to write the path for both
please help me out

hi narssimha
just identify the application server path. like in ur system some part it work like server . just identify.
its MENU-RUN- application sever path. then only its work.
and when ur downloading the business system we will create the communication channal . thats different

Receive Data from SOAP

Hi All,
This is another question regarding SOAP again. The requirement is our customer will send the asynchronous text messages in one tag of XML like
<header>
<Field> Text message</field>
</header>
I need to have the webservice in XI to receive this field message and save it in the folder.
Can any one help me to achive this in XI ?
Laks

Abhishiek,
The requirement is like customer will be sending the text content in a single tag of xml though the webservice i create.
I planned to create the webservice like
<Header>
<field>Text content</field>
</header>
So the customer can access this webservice and send their data in Field tag.
I created the datatype with the structure as mentioned above, and related message type and message interface.
I can create the sender service and its communication channal as SOAP .
Receive service and its communication channal as file.
Now my question is , Do I need any interface mapping for that or not as there is no target structure.. I just need to process that request and save that content in file.
Hope u understand the requirement. I am new to SOAP to XI scenario .
Laks

Can we Receive Response back to IDOC's

Hi,
I want to receive the Response back to IDOC.
Can IDOC handle with the Response from the Receiver Applications?? Not From XI System using ALEAUDIT.
Regards
Suman

hi suman,
no need for BPM ,u have to configure the SOAP as synchronous mode.
we r using SOAP ->xi->rcf scenario in synchronous mode.
here for the sender side we have created to 2 data type
1) one for SOAP Request (structure with requers will come )
2)second for SOAP responce (structure with responce have to send
create 2 message type but only one message interface
create 2 message mapping
one for sender request and one for the responce message .
create only one interface mapping.
only one communication channal can be used for both sender and receiver messages.
for your scenario, ie IDOC -xi-SOAP create ur idoc having both sender as well as responce message type .
and create 2 data type message type for SOAP request.
thanks
navneet

Alerts in ID

Hi ,
1. Is it possible to send an error from ID..If so,How is it possible.
2. Consider a file to file scenarion ...A file has been put in the source directory and is noy being picked up by XI .....as it is not an error...how can we send a mail ?

HiRaghavesh,
IF the Communication Channal doesnt pick the file then u need to see that error,then u hva eto go with Alerts,For creating the Alerts first u have to create the Alert category and then u have to create the Alert rules for that.
If u have any error then u can see error in ur Alertinbox or u can get mail to ur mailid.
Here some links for Alerts,in my project Alertcategory was done my onsite i have done Alert rules.i can helpu u in creating Alert rules.
/people/michal.krawczyk2/blog/2005/09/09/xi-alerts--step-by-step
/people/michal.krawczyk2/blog/2005/09/09/xi-alerts--troubleshooting-guide
http://help.sap.com/saphelp_nw04/helpdata/en/49/cbfb40f17af66fe10000000a1550b0/frameset.htm
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/1457-&#61664 [original link is broken] [original link is broken] [original link is broken];Inbound proxy
http://help.sap.com/saphelp_nw04/helpdata/en/9f/1d1aaae6a54c2c9acf16c942113879/frameset.htm.
/people/federico.babelis2/blog/2006/05/03/solution-manager-cen-and-alerting-configuration-guide-for-dummies
http://help.sap.com/saphelp_nw04/helpdata/en/3b/a8413599b244b6a03ac9d2a3bdaf2f/frameset.htm
Solution Manager 3.2 confirming open alerts
Configuring the Alert monitoring of Solution Manager 4.0
Regards,
Phani
Reward points if Helpful

9ir2 on mandrake 8.2

I installed 9ir2 on a mandrake 8.2 box, with 512M RAM, everything is Ok until the step database conf assist. it gave a message:
ora-03113 end-of-file on communication channal, when press the ok button, is closed.
the same thing happed when I use the dbca to create a database.
who can help?

You are on the bleeding edge in both Mandrake version and Oracle 9i version. Good luck from the rest of us who will be following you in the near future. One thing I can say is that Mandrake appears to be very similar to RedHat in the installation process. Most (but not all) solutions to Redhat problems apply to Mandrake as well.
I have not gotten the rev quite down but I believe that
Mandrake 8.2 is similar to Redhat 7.3
Mandrake 8.1 is similar to Redhat 7.2
etc.
I have been keeping track of my installation notes for Mandrake versions and Oracle versions but I have not had the opportunity to try this combo yet. Please keep this thread going until you get a solution. I will be doing this install soon probably and will include my complete notes at http://mywebpages.comcast.net/joseph.flynn/oracle.htm . So far, I have Oracle 8.1.6/7 on mandrake 8.0, Oracle 9i on Mandrake 8.0 and Oracle 9i on Mandrake 8.1
Good luck again.

Handling Italian Character ( any other Special Character)

Hi Experts,
We have the scenaria of IDoc to EDI conversion and in my EDI i get some Special characters like Italian or Russian character.
So in the Receiver Communication Channal , I have given the File encoding as ISO8859_5 . But it is still not working.
Can any one help me reading these characters in my CC.
Thanks
Lakshmi S

Hi Rajesh,
Thanks for your answers... but i tried all that option and also tried using XSLT mapping as well ..nothing worked out..
It seems to be Russian characters...
in the Payload i see the actual character but when it passess the CC it is writing something else instead of that characters..
Laks

How to make Recever Determation.......

Hi ALL
I make a new paty(eg. X) in ID .than make a business service and after maked a Communication channal . so plz tel me me next process how to make Recever Determation, Interface Determation, Sender Agreement, and Receiver agreement.

Hi,
Go through this blog.. it has everything which you need
https://www.sdn.sap.com/irj/scn/wiki?path=/display/xi/flatFILETOFLATFILE&
Regards,
Sarvesh

Sqlnet Communication problem

Hi Community,
I have a challenge getting 2 Oracle servers with each located in "internal" and "DMZ" network segments.
The oracle server on the internal network can communicate with the one on the DMZ but the one on the DMZ can NOT talk to the one on the internal network.
The customer wants the architecture to enable realtime data updates on the Oracle in DMZ.
My config is as follows: I need help.
ciscoasa# wr t
: Saved
ASA Version 8.4(3)
hostname ciscoasa
domain-name default.domain.invalid
enable password 8Ry2YjIyt7RRXU24 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
names
name 10.1.184.131 Proxy_Server
name 192.168.10.1 Internet_Router
name 10.1.184.122 Mail_Server
name 10.1.184.116 Mail_Server_2
name 10.1.184.121 Mail_Server_3
dns-guard
interface GigabitEthernet0/0
nameif Inside
security-level 100
ip address 10.1.184.1 255.255.248.0 standby 10.1.184.254
interface GigabitEthernet0/1
description LAN/STATE Failover Interface
interface GigabitEthernet0/2
nameif DMZ
security-level 50
ip address 192.168.30.1 255.255.255.0 standby 192.168.30.2
interface GigabitEthernet0/3
nameif Outside
security-level 0
ip address 192.168.10.2 255.255.255.0 standby 192.168.10.20
interface Management0/0
nameif management
security-level 100
ip address 192.168.1.1 255.255.255.0
management-only
boot system disk0:/asa843-k8.bin
ftp mode passive
clock timezone GMT 1
dns server-group DefaultDNS
domain-name default.domain.invalid
object network Proxy_Server
host 10.1.184.131
object network Mail_Server
host 10.1.184.122
object network Internet_Router
host 192.168.10.1
description Created during name migration
object network Mail_Server_2
host 10.1.184.116
description Created during name migration
object network Mail_Server_3
host 10.1.184.121
description Created during name migration
object network WebServer1
host 192.168.30.3
object network InternalNetwork
subnet 10.1.184.0 255.55.248.0
object network DMZ-IdentityPool
range 192.168.30.30 192.168.30.254
object network WebServer2
host 192.168.30.4
object network obj-remote
subnet 192.168.0.0 255.255.255.0
object network obj-DMZ
subnet 192.16.30.0 255.255.255.0
object network DatabaseServer
host 10.1.184.134
object network AppServer
host 10.1.184.126
object network MailServer
host 10.1.184.116
access-list Inside_access_in extended permit ip object Proxy_Server any
access-list Inside_access_in extended permit ip host 10.1.184.190 any
access-list Inside_access_in extended permit ip host 10.1.184.83 any
access-list Inside_access_in extended permit icmp host 10.1.184.190 any
access-list Inside_access_in extended permit ip host 10.1.184.67 any inactive
access-list Inside_access_in extended permit ip host 10.1.184.83 object Internet_Router
access-list Inside_access_in extended permit ip host 10.1.184.190 object Internet_Router
access-list Inside_access_in extended permit udp any any
access-list Inside_access_in extended permit icmp any any
access-list Inside_access_in extended permit ip object Mail_Server any
access-list Inside_access_in extended permit tcp object Mail_Server any eq smtp
access-list Inside_access_in extended permit ip object Mail_Server_2 any
access-list Inside_access_in extended permit tcp object Mail_Server_2 any eq smtp
access-list Inside_access_in extended deny tcp any any eq smtp
access-list Inside_access_in extended permit icmp host 10.1.184.43 any
access-list Inside_access_in extended permit ip object Mail_Server_3 any
access-list Inside_access_in extended permit tcp object Mail_Server_3 any eq smtp
access-list Inside_access_in extended permit ip host 10.1.184.190 host 192.168.30.3
access-list Inside_access_in extended permit tcp object InternalNetwork host 192.168.30.3 eq www
access-list Inside_access_in extended permit ip host 10.1.184.137 host 10.1.184.133
access-list Inside_access_in extended permit ip host 10.1.184.62 host 10.1.184.133
access-list Inside_access_in extended permit ip host 10.1.184.117 any
access-list Inside_access_in extended permit ip host 10.1.184.117 object Internet_Router
access-list Inside_access_in extended permit ip host 10.1.184.129 any
access-list Inside_access_in extended permit ip host 10.1.184.129 object Internet_Router
access-list Inside_access_in extended permit ip host 10.1.184.150 host 10.1.184.133
access-list Inside_access_in extended permit ip host 10.1.184.150 any
access-list Inside_access_in extended permit ip host 10.1.184.190 host 192.168.30.4
access-list Inside_access_in extended permit tcp object InternalNetwork host 192.168.30.4 eq www
access-list Inside_access_in extended permit tcp host 10.1.184.134 host 192.168.30.4 eq sqlnet
access-list Outside_access_in extended permit udp any eq domain object Proxy_Server
access-list Outside_access_in extended permit icmp object Internet_Router any
access-list Outside_access_in extended permit icmp any host 10.1.184.190
access-list Outside_access_in extended permit icmp any host 10.1.184.83 inactive
access-list Outside_access_in extended permit tcp any object Proxy_Server eq https
access-list Outside_access_in extended permit tcp any object Proxy_Server eq www
access-list Outside_access_in extended permit tcp any object Mail_Server eq smtp inactive
access-list Outside_access_in extended permit tcp any object Mail_Server_2 eq pop3
access-list Outside_access_in extended permit udp any eq domain object Mail_Server_2
access-list Outside_access_in extended permit tcp any object Mail_Server eq imap4 inactive
access-list Outside_access_in extended permit icmp any object Mail_Server inactive
access-list Outside_access_in extended permit tcp any object Mail_Server_2 eq smtp
access-list Outside_access_in extended permit tcp any object Mail_Server_2 eq imap4
access-list Outside_access_in extended permit icmp any object Mail_Server_2
access-list Outside_access_in extended permit icmp any host 10.1.184.43
access-list Outside_access_in extended permit tcp any host 192.168.30.3 eq www
access-list Outside_access_in extended permit tcp any host 192.168.30.3 eq https
access-list Outside_access_in extended permit icmp any host 192.168.30.3
access-list Outside_access_in extended permit icmp any any echo-reply
access-list Outside_access_in extended permit icmp any host 192.168.30.3 echo
access-list Outside_access_in extended permit tcp any host 192.168.30.4 eq www
access-list Outside_access_in extended permit tcp any host 192.168.30.4 eq https
access-list Outside_access_in extended permit icmp any host 192.168.30.4 echo
access-list Outside_access_in extended permit icmp any host 192.168.30.4
access-list branchgroup-SplitACL standard permit 10.0.0.0 255.0.0.0
access-list branchgroup-SplitACL standard permit 192.168.30.0 255.255.255.0
access-list DMZ_access_in extended permit tcp host 192.168.30.4 host 192.168.30.116 eq smtp
access-list DMZ_access_in extended permit icmp host 192.168.30.4 any
access-list DMZ_access_in extended permit ip host 192.168.30.4 host 192.168.30.134
access-list DMZ_access_in extended permit tcp host 192.168.30.4 host 192.168.30.134 eq sqlnet
pager lines 24
logging enable
logging timestamp
logging standby
logging emblem
logging list InformationalLog level informational
logging list InformationalLog message 101001
logging buffer-size 16384
logging console notifications
logging monitor errors
logging buffered critical
logging trap errors
logging asdm critical
logging mail informational
logging host Inside 10.1.184.132
logging host Inside 10.1.184.190 6/1470
logging debug-trace
logging ftp-server 10.1.184.190 \\marinasec\akanoa akanoa *****
logging permit-hostdown
logging class auth buffered emergencies trap emergencies
logging class bridge buffered emergencies trap emergencies
logging class config buffered alerts trap emergencies
logging class ip buffered emergencies trap alerts
logging class sys trap alerts
logging class ca trap emergencies
logging class email buffered emergencies trap errors
mtu Inside 1500
mtu DMZ 1500
mtu Outside 1500
mtu management 1500
ip local pool remoteusers 192.168.0.1-192.168.0.254
failover
failover lan unit secondary
failover lan interface stateful_failover GigabitEthernet0/1
failover replication http
failover link stateful_failover GigabitEthernet0/1
failover interface ip stateful_failover 192.168.20.1 255.255.255.252 standby 192.168.20.2
no monitor-interface management
icmp unreachable rate-limit 1 burst-size 1
icmp permit any Inside
asdm image disk0:/asdm-647.bin
no asdm history enable
arp timeout 14400
nat (DMZ,Outside) source static obj-DMZ obj-DMZ destination static obj-remote obj-remote
nat (Inside,Outside) source static InternalNetwork InternalNetwork destination static obj-remote obj-remote
object network Mail_Server
nat (Inside,Outside) static Mail_Server no-proxy-arp route-lookup
object network WebServer1
nat (DMZ,Outside) static 192.168.30.3 dns
object network WebServer2
nat (DMZ,Outside) static 192.168.30.4 dns
object network DatabaseServer
nat (Inside,DMZ) static 192.168.30.134
object network AppServer
nat (Inside,DMZ) static 192.168.30.126
object network MailServer
nat (Inside,DMZ) static 192.168.30.116
access-group Inside_access_in in interface Inside
access-group DMZ_access_in in interface DMZ
access-group Outside_access_in in interface Outside
route Outside 0.0.0.0 0.0.0.0 Internet_Router 1
timeout xlate 3:00:00
timeout pat-xlate 0:00:30
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
aaa-server vpn protocol radius
aaa-server vpn (Inside) host 10.1.184.119
key *****
aaa-server vpn (Inside) host 10.1.184.120
key *****
user-identity default-domain LOCAL
http server enable
http 10.1.184.190 255.255.255.255 Inside
http 10.1.184.2 255.255.255.255 Inside
http 10.1.184.83 255.255.255.255 Inside
http 192.168.1.0 255.255.255.0 management
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec ikev1 transform-set rmtset esp-3des esp-md5-hmac
crypto dynamic-map dyn1 1 set ikev1 transform-set rmtset
crypto dynamic-map dyn1 1 set reverse-route
crypto map mymap 1 ipsec-isakmp dynamic dyn1
crypto map mymap interface Outside
crypto ikev1 enable Outside
crypto ikev1 policy 1
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 43200
telnet 10.1.184.83 255.255.255.255 Inside
telnet 10.1.184.190 255.255.255.255 Inside
telnet 10.1.184.167 255.255.255.255 Inside
telnet timeout 5
ssh 10.1.184.83 255.255.255.255 Inside
ssh 10.1.184.190 255.255.255.255 Inside
ssh 10.1.184.43 255.255.255.255 Inside
ssh timeout 5
console timeout 0
threat-detection basic-threat
threat-detection statistics
threat-detection statistics tcp-intercept rate-interval 30 burst-rate 400 average-rate 200
webvpn
group-policy branchgroup internal
group-policy branchgroup attributes
dns-server value 10.1.184.120
split-tunnel-policy tunnelspecified
split-tunnel-network-list value branchgroup-SplitACL
default-domain value marinasecuritieslimited.com
username sannib password 3gB/xWLMBVp/AjjW encrypted
username adebimpel password O./lZ/3rlYD/87u2 encrypted
username ojoawob password w1h9Aq2Welzv1fuW encrypted
username agbajer password NuDaZPLHC0BcF7iI encrypted
username oyenihib password eoxptVEUfczen6VR encrypted
username odewolef password yB12L9t1gcr.Wgx/ encrypted
username mainuser password 8KBTvbq5FOuoFce2 encrypted privilege 15
username maakano password c1Cb3uSluyfsyWUb encrypted
tunnel-group branchgroup type remote-access
tunnel-group branchgroup general-attributes
address-pool remoteusers
default-group-policy branchgroup
tunnel-group branchgroup ipsec-attributes
ikev1 pre-shared-key *****
class-map inspection_default
match default-inspection-traffic
policy-map type inspect dns migrated_dns_map_1
parameters
message-length maximum client auto
message-length maximum 512
policy-map global_policy
class inspection_default
inspect dns migrated_dns_map_1
inspect ftp
inspect h323 h225
inspect h323 ras
inspect rsh
inspect rtsp
inspect esmtp
inspect skinny
inspect sunrpc
inspect xdmcp
inspect sip
inspect netbios
inspect tftp
inspect ip-options
class class-default
user-statistics accounting
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
call-home
profile CiscoTAC-1
no active
destination address http https://tools.cisco.com/its/service/oddce/services/DDCEService
destination address email [email protected]
destination transport-method http
subscribe-to-alert-group diagnostic
subscribe-to-alert-group environment
subscribe-to-alert-group inventory periodic monthly
subscribe-to-alert-group configuration periodic monthly
subscribe-to-alert-group telemetry periodic daily
hpm topN enable
Cryptochecksum:bbe838eb9af33fc84083989823bc0c22
: end
[OK]
ciscoasa#

Hi,
Seems to me that you have configured Static NAT from "inside" to "dmz" so that the "inside" servers are visible to the "dmz" with the IP address belonging to the "dmz"
Is this something that you absolutely need? Is there something preventing you from using the IP address ranges on both "inside" and "dmz" and not doing NAT for them at all between those interfaces?
IF you want to keep the current setup intact regarding NAT, change the DMZ ACL to use the actual 10.1.184.x IP addresses as the destination IP address in the ACL.
In other words, always use the Real IP address of the host in the ACL configuration, NOT the NAT IP address. After doing that change I suppose it should also work for "dmz" to "inside". (NAT IP was used in the ACL in the ASA versions 8.2 and below, the Real IP address is used in software 8.3 and above)
Change
access-list DMZ_access_in extended permit tcp host 192.168.30.4 host 192.168.30.116 eq smtp
access-list DMZ_access_in extended permit icmp host 192.168.30.4 any
access-list DMZ_access_in extended permit ip host 192.168.30.4 host 192.168.30.134
access-list DMZ_access_in extended permit tcp host 192.168.30.4 host 192.168.30.134 eq sqlnet
To
access-list DMZ_access_in extended permit tcp host 192.168.30.4 host 10.1.184.116 eq smtp
access-list DMZ_access_in extended permit icmp host 192.168.30.4 any
access-list DMZ_access_in extended permit ip host 192.168.30.4 host 10.1.184.134
access-list DMZ_access_in extended permit tcp host 192.168.30.4 host 10.1.184.134 eq sqlnet
You can also use the "object" names in the ACL.
Which would be
access-list DMZ_access_in extended permit tcp host 192.168.30.4 object MailServer eq smtp
access-list DMZ_access_in extended permit icmp host 192.168.30.4 any
access-list DMZ_access_in extended permit ip host 192.168.30.4 object DatabaseServer
access-list DMZ_access_in extended permit tcp host 192.168.30.4 object DatabaseServer eq sqlnet
Hope the above helps Please ask more if needed.
- Jouni

Open and close communication channel in one link

Hello,
I implement with successful the scenario that described in this blog:
Control Communication Channels Externally without using RWB
Right now I use with this link to start the CC
http://aaaa:50000/AdapterFramework/ChannelAdminServlet?party=*&service=Open_Friday_Service_Sender&channel=Open_Friday_Sender&action=start
And with this link to stop the CC
http://aaaa:50000/AdapterFramework/ChannelAdminServlet?party=*&service=Open_Friday_Service_Sender&channel=Open_Friday_Sender&action=stop
I looking for the way to start and stop the communication channel in one link.
Elad

hi elan
i think you need to write an abap program and schedule it..
abap program will call this HTTP link as The URL has no dependency on where it is called.
regards
kummari

Communication between multiple JVMs

We have a Java toolkit that is shipped as a JAR file. The toolkit is ported from a C++ DLL running on Windows. Therefore, in both instances (Java and C++), we can't control who loads us or when.
I need to communicate between different JVMs running on the same machine. The communication is very simple: "Is this user logged on in your JVM?" I send a string to the other JVM and I get back a boolean. I don't need to worry about crossing machine boundaries. Also, I'm not expecting to have a huge number of JVMs running. Maybe 3 or 4 could be likely. However, the solution does need to scale in case there are more than that. I'm not setting a limit on the number of JVMs either.
The C++ code handled this situation very easily and elegantly. It created a named system semaphore (mutex) whenever a user logged on. The name of the mutex was the username. So, if there were multiple instances of the DLL running in separate processes (EXEs), we could easily tell if this user was logged on in another instance. We'd try to create the system semaphore - it would fail saying the name already exists. Therefore, we'd know the user was already logged on. The named system semaphore provided the means for a machine-global list - which is exactly what we wanted. It also had this extra benefit: if the process terminates normally or abnormally, the system semaphore is removed from memory. This means: the application is terminated, the user is no longer logged on, and we can relog this user on.
Therefore, I have 2 requirements:
1) A machine-global list where we can place a string. Keep in mind, it doesn't absolutely have to be a machine-global list. A suitable means to talk to other JVMs is acceptable too.
2) If the process exits normally or abnormally, the string(s) get removed (for this JVM) from the list. Abnormal termination is the more important one to focus on because lots of people of varying skill levels use our toolkit. Abnormal terminations can be common.
The first thought is to store these in a file. That solves #1, but not #2. I've seen the JIPC package. However, I'm not too crazy about requiring 3rd party developers to start up another program (JIPC) before they start up their application. As I said, we're just a toolkit so we can't control when or who loads us. It's not totally out of the question, but I'd prefer something else.
I have a fairly involved solution that involves sockets. The first JVM creates a ServerSocket on a specific port and becomes the server. Subsequent JVMs also try to create the ServerSocket on the same port. They get a BindException because the ServerSocket already exists, so they know they're clients. Then, they create a client socket and talk to the server that way. This gets a little hairy when the server goes away. The clients will scramble to become the server and then all the other clients need to reconnect to the new server.
This proposed solution sounds like it will address both requirements. However, I'm looking for something simpler. I'm asking this forum for help in case there's an easier way to do this. I don't have the breadth of experience with Java yet to know if there's a simpler way to fix this. If I have to go with the socket solution, I will. I just didn't want to overlook something simple that is already built into Java.
Thanks for any tips or suggestions

Thanks for the response.
FileLock. We still have to target JDK 1.3 so we can't use FileLocks (at this point)
JNI: That's an interesting idea. I suspect many people are using our software on Windows. Therefore, we could probably fix it in Windows the same as in the C++ code. If they're not on Windows, we could use the Sockets approach.
I also had another idea: how about hashing the username string into some integer (or long) value. Then use the hashed value to lock some other resource: like the port number passed to ServerSocket. I know ServerSocket only accepts 0 - 0xFFFF so this obviously won't work. But is there some other system-wide thing we could lock given an integral value?

A message to Creative from the Linux and geek users commun

Please pardon the possible misspellings/syntax errors in this post, as English is not my nati've language. I am still confident that you will grasp the essence of my message. Thank you.
I have been following the downfall of Creative in the last few days, and all I can say is : You had it coming. I am another customer who was decei'ved by buying one of your expensi've product. I spent 450$ on your X-Fi Elite pro, only to wait endlessly for stable vista drivers, which are still unstable and crippled. Yes, I know you had problems with how Microsoft changed completely its audio API a few months before launching, but the fact is that this is stuff that can happen, and you had to allocate more budget in order to develop drivers quickly to satisfy your customers. Instead, you just ignored us. And now you're paying for it.
It's kind of sad that your stock price is falling, but at the same time, it's about time the consumers could unite and get their revenge, and you are actually paying for laughing in our faces for so long. I have been waiting and waiting for a driver for Linux, since you would not provide stable drivers for Vista. Your website dedicated to open source drivers looks like it was coded in 995, with crappy graphics, just to show us that you don't care. And after waiting for over a year for drivers, you gave us a non-working driver, and you won't post any updates at all. ?
I shell out 450$ for an X-FI Elite Pro, and you laugh into my face, not once (with sub-par drivers for Vista and a long wait), but twice with your non-working Linux drivers ? I'm disgusted.
I wish your corporate people would understand what just happened, and listen to us, the geeky consumers, who buy, recommend, and install your products for themselves, customers, friends, and family. ? But I know that it does not work that way. Your marketing people, your legal department, your finance departement and all your corporate structure don't CARE about the end-user, but you have made a big mistake by ignoring us all these years. If you want to save your company, you really, really need to open up and develop a totally different relationship with your customer base. But knowing how this works, I'm sure that :?
. Nobody important in the company structure will take time to read this thread, hoping it will go away, and thinking that the new product lines will make us forget all of this;
2. You will not take this Public Relations Disaster seriously and think it will simply disapear
Well let me tell you what's gonna happen : Don't underestimate us, your customers. We will remember what happened in the past few days, but also how you treated us in the past few years. Unless you radically change your practices, and really show good faith, you are certainly going down. I, for one, am considering selling my X-Fi Elite Pro and rely only on onboard sound because at least the drivers work on all available platforms. But if you only knew how I wished to have decent support under Linux or Vista ! But you don't even talk with us, you provide crappy drivers and then forget us !? That's not the way to treat us !? So, unless you provide more than your little PR stunt of april st, where you don't even apologize and recognize your lack of support, I will never buy any of your products again, and I will tell everybody I know to stay away from your products.
Be aware : This is not a feeling that will go away in a few weeks/few months. I have been using Creative Cards since 996, and have always been a loyal customer, but I implore you to change, and to do it fast. I really hope you do.
Thank you for your time. ?

Thank you Igor, your article is very interesting indeed, and thanks for the other responses as well, it is really appreciated.
I recently tried OSS on Linux, which offers partial support for the X-FI, but with no success. I fear that without any proper documentation provided to ALSA, the complexity of the X-Fi hardware won't allow the development of acceptable drivers for Linux anytime soon. As for Creative development for Linux, well, just go and check out their support page : http://opensource.creative.com/soundcard.html.
It is beyond my comprehension as to why Creative simply refuses to document its hardware. I mean, I know about IP considerations and such, but the reality is that Creative has a very large part of the market for high-end audio products, and they do not have yet any serious competitors for the gaming/music enthusiast market who don't want to rely on onboard audio. (I know about M-Audio and a few others, but they mainly appeal to profesionals). So, to document their hardware for the open source community has more benefits than risks, since they don't have to pay for driver development, and since they almost sued daniel_K, I'm not afraid that their legal department would track anyone who would try to breach any IP rights by developing some hardware with the documentation they would release. So WHY ? WHY Creative, won't you release proper documentation? Why won't you help us help you ? Is it just by ideology ? That opening your code is bad ? Well, you're wrong. ?
But it may not be too late, should you *AT LEAST* provide us communication about what's going on at Creative regarding open source. Is it that hard for a Multinational Firm to hire a few developers to develop a driver for Linux ? Why won't you put up a blog for your developer, who can talk about what they're doing, what are the limitations, the hurdles, but at least show a little transparency and stop pretending you really care. ?

Using a variable in communication channel

Hi,
I have a lot of Communication Channels looking for files in the same directory. This directory's path will be changed soon and so I assume I'll have to change all my Communication Channels.
I was wondering whether there was a means of using a variable for the Source Directory in order to just have to change its value where it is defined and not every where it is used...
Regards
Yann

Hi,
Is this a sender file adapter? or a receiver file adapter?
You can make a change / make the receiver file adapter's directory dynamic by setting the value during runtime in the mapping.
Use this blog and the code in the blog to acheive this,
/people/michal.krawczyk2/blog/2005/11/10/xi-the-same-filename-from-a-sender-to-a-receiver-file-adapter--sp14
Sender File adapter, I dont think this is possible.
Regards,
Bhavesh

Communication Channal

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