[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]
Subject: Re: [sca-assembly] NEW ISSUE: Test 6019 assumed injection behavior
I thought the behavior was runtimes could avoid injecting null
references for all multiplicity values. Maybe this was changed or I
was just wrong. This seems a little strange though as the behavior for
0..1 will be different than 1..n, i.e. the former is not injected, the
latter is.
Jim
On Jan 12, 2010, at 2:29 PM, David Booz wrote:
> An unwired reference with a multiplicity of 0..n MUST be presented
> to the
> implementation code by the SCA runtime as an empty array or empty
> collection [JCA90023]
>
>
> How can a runtime have a null reference given the above statement in
> Java CAA?
>
>
> Dave Booz
> STSM, BPM and SCA Architecture
> Co-Chair OASIS SCA-Policy TC and SCA-J TC
> "Distributed objects first, then world hunger"
> Poughkeepsie, NY (845)-435-6093 or 8-295-6093
> e-mail:booz@us.ibm.com
>
>
> |------------>
> | From: |
> |------------>
>> --------------------------------------------------------------------------------------------------------------------------------------------------|
> |Mike Edwards
> <
> mike_edwards
> @uk
> .ibm
> .com
> >
> |
>> --------------------------------------------------------------------------------------------------------------------------------------------------|
> |------------>
> | To: |
> |------------>
>> --------------------------------------------------------------------------------------------------------------------------------------------------|
> |OASIS Assembly <sca-assembly@lists.oasis-
> open
> .org
> >
> |
>> --------------------------------------------------------------------------------------------------------------------------------------------------|
> |------------>
> | Date: |
> |------------>
>> --------------------------------------------------------------------------------------------------------------------------------------------------|
> |01/12/2010 04:16
> AM
> |
>> --------------------------------------------------------------------------------------------------------------------------------------------------|
> |------------>
> | Subject: |
> |------------>
>> --------------------------------------------------------------------------------------------------------------------------------------------------|
> |Re: [sca-assembly] NEW ISSUE: Test 6019 assumed injection
> behavior
> |
>> --------------------------------------------------------------------------------------------------------------------------------------------------|
>
>
>
>
>
>
> Logged as: http://www.osoa.org/jira/browse/ASSEMBLY-201
>
> Yours, Mike.
>
> Strategist - Emerging Technologies, SCA & SDO.
> Co Chair OASIS SCA Assembly TC.
> IBM Hursley Park, Mail Point 146, Winchester, SO21 2JN, Great Britain.
> Phone & FAX: +44-1962-818014 Mobile: +44-7802-467431
> Email: mike_edwards@uk.ibm.com
>
>
> From: Jim Marino <jim.marino@gmail.com>
>
> To: OASIS Assembly <sca-assembly@lists.oasis-open.org>
>
> Date: 11/01/2010 18:16
>
> Subject: [sca-assembly] NEW ISSUE: Test 6019 assumed injection
> behavior
>
>
>
>
>
>
>
>
>
> TARGET: SCA Assembly Conformance Tests
>
> DESCRIPTION:
>
> Test case ASM_6019 verifies an autowire reference with multiplicity
> 0..n that has no matching services still runs. The component
> implementation, org.oasisopen.sca.test.service1Impl4, has an array
> type for the autowire reference. The operation that is invoked on that
> implementation iterates the array and invokes wired services without
> checking for null. Some runtimes may not inject the reference if no
> matching wires are found. Consequently, this results in an NPE since
> the reference member variable is not set:
>
> @Service(Service1.class)
> public class service1Impl4 implements Service1 {
>
> @Property
> public String serviceName = "service1";
> // Required = false + an array -> multiplicity 0..n
> @Reference(required=false)
> public Service1[] reference1 = null;
>
> public String operation1(String input) {
> String result = serviceName + "
> operation1
> invoked";
> // Call each of the references in the
> array, concatenating the results
> for( int i=0 ; i <
> reference1.length; i+
> + ) {
> result =
> result.concat("
> ");
> result =
> result.concat
> ( reference1[i].operation1(input) );
> } // end for
> return result;
> }
>
> }
>
>
> SVN Version: 426
>
> PROPOSAL:
>
> Code defensively, assuming the reference may not be injected. A
> potential replacement is:
>
> @Service(Service1.class)
> public class service1Impl4 implements Service1 {
>
> @Property
> public String serviceName = "service1";
>
> @Reference(required=false)
> public Service1[] reference1;
>
> public String operation1(String input) {
> StringBuilder result = new
> StringBuilder
> (serviceName).append("
> operation1 invoked");
> for (Service1 aReference1 : reference1) {
> String value =
> aReference1.operation1(input);
> result = result.append("
> ").append(value);
> }
> return result.toString();
> }
>
> }
>
>
> ---------------------------------------------------------------------
> To unsubscribe from this mail list, you must leave the OASIS TC that
> generates this mail. Follow this link to all your TCs in OASIS at:
> https://www.oasis-open.org/apps/org/workgroup/portal/my_workgroups.php
>
>
>
>
>
>
>
>
>
>
> Unless stated otherwise above:
> IBM United Kingdom Limited - Registered in England and Wales with
> number
> 741598.
> Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire
> PO6 3AU
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe from this mail list, you must leave the OASIS TC that
> generates this mail. Follow this link to all your TCs in OASIS at:
> https://www.oasis-open.org/apps/org/workgroup/portal/my_workgroups.php
>
[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]