Is the difference between a dependency and a prerequisite in the features.xml file that a dependency should be installed if not there but a prerequisite will cause a failure if it is not there. If that is the case also what happens when you have install=auto and use a prerequisite="true"
On 2015-07-24 12:59, Pratt, Jason wrote: > Hi Ed, > > They should show up like: > > 344 | Active | 50 | 1.3.5 | jettison > > 345 | Active | 50 | 2.4.1 | Jackson-core > > 346 | Active | 50 | 2.4.1 | jackson-databind > > 347 | Active | 50 | 2.4.1 | Jackson-annotations > > I've found the "dependency" is sometimes flaky and use the install=auto flag > when I want something to be installed > > Here is my feature for Jackson: > > <feature name=_"jackson"_ description=_"Jackson requirements for Karaf"_ > install=_"auto"_ version=_"2.5.4"_ resolver=_"(obr)"_> > > <bundle>mvn:com.fasterxml.jackson.core/jackson-core/2.5.4</bundle> > > <bundle>mvn:com.fasterxml.jackson.core/jackson-annotations/2.5.4</bundle> > > <bundle>mvn:com.fasterxml.jackson.core/jackson-databind/2.5.4</bundle> > > <bundle>mvn:com.fasterxml.jackson.jaxrs/jackson-jaxrs-json-provider/2.5.4</bundle> > > > <bundle>mvn:com.fasterxml.jackson.jaxrs/jackson-jaxrs-base/2.5.4</bundle> > > <bundle>mvn:org.codehaus.jackson/jackson-jaxrs/1.9.13</bundle> > > <bundle>mvn:org.codehaus.jackson/jackson-core-asl/1.9.13</bundle> > > <bundle>mvn:org.codehaus.jackson/jackson-mapper-asl/1.9.13</bundle> > > </feature> > > I had to include the old codehaus jars for some CXF issues, hope this helps > > Kind regards, > > Jason > > FROM: Ed Hillmann [mailto:[email protected]] > SENT: Thursday, July 23, 2015 7:07 PM > TO: [email protected] > SUBJECT: Understanding dependency in features.xml... > > Hi. I am attempting to define bundles as dependencies, but am getting some > unexpected behaviour. My presumption is I don't understand how it's meant to > be used. The doco around this is short and sweet: "A bundle can be flagged as > being a dependency, using the dependency attribute set to true on the > <bundle/> element." > > My interpretation is this means "If the bundle is not there already, install > it, I depend on it. If not, just use it". Perhaps I have interpreted it > wrong. > > I have a feature xml file that contains these definitions: > > <feature name="jackson" version="2.5.4" description="Jackson libraries"> > > <bundle > dependency="true">mvn:com.fasterxml.jackson.core/jackson-core/2.5.4</bundle> > > <bundle > dependency="true">mvn:com.fasterxml.jackson.core/jackson-annotations/2.5.4</bundle> > > > <bundle > dependency="true">mvn:com.fasterxml.jackson.core/jackson-databind/2.5.4</bundle> > > > <bundle > dependency="true">mvn:com.fasterxml.jackson.module/jackson-module-jaxb-annotations/2.5.4</bundle> > > > </feature> > > <feature name="jackson-jaxrs" version="2.5.4" description="Jackson JAX-RS > libraries"> > > <bundle > dependency="true">mvn:com.fasterxml.jackson.jaxrs/jackson-jaxrs-base/2.5.4</bundle> > > > <bundle > dependency="true">mvn:com.fasterxml.jackson.jaxrs/jackson-jaxrs-json-provider/2.5.4</bundle> > > > </feature> > > In the same file, I have a third feature that references these jackson > features: > > <feature name="my-core-bundles" version="1.0.4-SNAPSHOT"> > > <details>Features or bundles needed to support my code</details> > > <feature version="1.0.2.RELEASE">gemini-blueprint</feature> > > <feature version="4.0.0">war</feature> > > <feature version="4.3.6.Final">hibernate</feature> > > <feature version="2.5.4">jackson</feature> > > <feature version="2.5.4">jackson-jaxrs</feature> > > <feature version="3.1.0">cxf</feature> > > <feature version="4.1.6.RELEASE_1">spring</feature> > > <feature version="4.1.6.RELEASE_1">spring-jdbc</feature> > > <feature version="4.1.6.RELEASE_1">spring-orm</feature> > > <feature version="4.1.6.RELEASE_1">spring-tx</feature> > > <feature version="1.2.1.RELEASE_1">spring-data-cassandra</feature> > > <bundle dependency="true">mvn:org.apache.commons/commons-math3/3.5</bundle> > > <bundle dependency="true">mvn:com.hazelcast/hazelcast/3.5</bundle> > > <bundle dependency="true">mvn:io.reactivex/rxjava/1.0.12</bundle> > > </feature> > > I can add my feature repository, and I can install my feature. And it works, > apparently without an error. If I list my installed features, it says the > Jackson features are started... > > minestar-core-bundles | 1.0.4.SNAPSHOT | x | Started | > my-core-features-1.0.4-SNAPSHOT | myCore Bundles > > jackson | 2.5.4 | | Started | minestar-core-features-1.0.4-SNAPSHOT | Jackson > libraries > > jackson-jaxrs | 2.5.4 | | Started | minestar-core-features-1.0.4-SNAPSHOT | > Jackson JAX-RS libraries > > However, the jackson bundles are not visible when I list the bundles. They're > not even installed. Anything I use which depends on Jackson won't resolve > because it can't find anything. > > If I define my Jackson feature without the "dependency" attribute, it works > more like I expected. > > Is my understanding of what the dependency attribute for a bundle in the > features.xml incorrect? If not, am I doing something else incorrectly? > > Thanks for any help, > > Ed
