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20.8. Fabric Maven Configuration Reference

Overview
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This section provides a configuration reference for the Maven proxy configuration settings, which includes properties from the io.fabric8.agent PID, the io.fabric8.maven PID, and the io.fabric8.maven.proxy PID.

Repository URL syntax
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You can specify a repository location using a URL with a file:, http:, or https: scheme, optionally appending one or more of the following suffixes:
@snapshots
Allow snapshot versions to be read from the repository.
@noreleases
Do not allow release versions to be read from the repository.
@id=RepoName
(Required) Specifies the repository name. This setting is required by the Aether handler.
@multi
Marks the path as a parent directory of multiple repository directories. At run time the parent directory is scanned for subdirectories and each subdirectory is used as a remote repository.
@update=UpdatePolicy
Specifies the Maven updatePolicy, overriding the value of org.ops4j.pax.url.mvn.globalUpdatePolicy.
@releasesUpdate=UpdatePolicy
Specifies the Maven updatePolicy specifically for release artifacts (overriding the value of @update).
@snapshotsUpdate=UpdatePolicy
Specifies the Maven updatePolicy specifically for snapshot artifacts (overriding the value of @update).
@checksum=ChecksumPolicy
Specifies the Maven checksumPolicy, which specifies how to react if a downloaded Maven artifact has a missing or incorrect checksum. The policy value can be: ignore, fail, or warn.
@releasesChecksum=ChecksumPolicy
Specifies the Maven checksumPolicy specifically for release artifacts (overriding the value of @checksum).
@snapshotsChecksum=ChecksumPolicy
Specifies the Maven checksumPolicy specifically for snapshot artifacts (overriding the value of @checksum).
For example: 
https://repo.example.org/maven/repository@id=example.repo
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io.fabric8.agent PID
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The io.fabric8.agent PID configures the Fabric8 agent. The io.fabric8.agent PID supports the following properties relating specifically to Maven configuration:
org.ops4j.pax.url.mvn.connection.bufferSize
Configure buffer size for HTTP connections (output and input buffers), defaults to 8192 bytes.
org.ops4j.pax.url.mvn.connection.retryCount
Number of connection retries after failure is detected in HTTP client. Default is 3.
org.ops4j.pax.url.mvn.defaultRepositories
Specifies a list of default (local) Maven repositories that are checked before looking up the remote repositories. Specified as a comma-separated list of file: repository URLs, where each repository URL has the syntax defined in the section called “Repository URL syntax”.
org.ops4j.pax.url.mvn.globalChecksumPolicy
Specifies the Maven checksumPolicy. The default profile sets this property to warn.
org.ops4j.pax.url.mvn.globalUpdatePolicy
Specifies the Maven updatePolicy, which determines how often Aether attempts to update local Maven artifacts from remote repositories. Can take the following values:
  • always—always resolve the latest SNAPSHOT from remote Maven repositories.
  • never—never check for newer remote SNAPSHOTS.
  • daily—check on the first run of the day (local time).
  • interval:Mins—check every Mins minutes.
The default profile sets this property to daily. If not set, default is daily.
org.ops4j.pax.url.mvn.localRepository
Specifies the local Maven repository, which is used to cache artifacts downloaded from remote repositories (as specified in org.ops4j.pax.url.mvn.repositories).
The default profile sets this property to ${karaf.data}/repository-agent.
org.ops4j.pax.url.mvn.repositories
Specifies a list of remote Maven repositories that can be searched for Maven artifacts. This property can be used in any of the following ways:
  • Use this property and disable settings.xml
    Normally, the org.ops4j.pax.url.mvn.repositories property is set as a comma-separated list of repository URLs, where the \ character can be used for line continuation. In this case, any Maven settings.xml file is ignored (that is, the org.ops4j.pax.url.mvn.settings property setting is ignored). For example, this property is set as follows in the default profile: 
    org.ops4j.pax.url.mvn.repositories = http://repo1.maven.org/maven2@id=maven.central.repo,
      https://maven.repository.redhat.com/ga@id=redhat.ga.repo,
      https://maven.repository.redhat.com/earlyaccess/all@id=redhat.ea.repo,
      https://repository.jboss.org/nexus/content/groups/ea@id=fuseearlyaccess
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  • Use settings.xml and disable this property
    If you want to use a Maven settings.xml file to configure the list of remote repositories instead of this property, you must remove the org.ops4j.pax.url.mvn.repositories property settings from the profile. For example, assuming that this property is set in the default profile, you can delete it with the following command: 
    profile-edit --delete --pid io.fabric8.agent/org.ops4j.pax.url.mvn.repositories default
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org.ops4j.pax.url.mvn.settings
Specifies a path on the file system to override the default location of the Maven settings.xml file. The Fabric8 agent resolves the location of the Maven settings.xml file in the following order:
  1. The location specified by org.ops4j.pax.url.mvn.settings.
  2. ${user.home}/.m2/settings.xml
  3. ${maven.home}/conf/settings.xml
  4. M2_HOME/conf/settings.xml
Note
All settings.xml files are ignored, if the org.ops4j.pax.url.mvn.repositories property is set.
org.ops4j.pax.url.mvn.socket.connectionTimeout
Timeout in milliseconds when establishing a HTTP connection during artifact resolution.
org.ops4j.pax.url.mvn.socket.keepAlive
SO_KEEPALIVE option for sockets. Defaults to false.
org.ops4j.pax.url.mvn.socket.linger
SO_LINGER option for sockets. Defaults to -1.
org.ops4j.pax.url.mvn.socket.readTimeout
Timeout in milliseconds when reading data after connecting to a remote repository.
org.ops4j.pax.url.mvn.socket.reuseAddress
SO_REUSEADDR option for sockets. Defaults to false.
org.ops4j.pax.url.mvn.socket.tcpNoDelay
TCP_NODELAY option for sockets. Defaults to true.
org.ops4j.pax.url.mvn.timeout
Default value for connection and read timeouts, when socket.readTimeout and socket.connectionTimeout are not specified.

io.fabric8.maven PID
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The io.fabric8.maven PID configures the io.fabric8.maven bundle (which is used by the Maven proxy server) and supports the following properties:
io.fabric8.maven.connection.bufferSize
Configure buffer size for HTTP connections (output and input buffers), defaults to 8192 bytes.
io.fabric8.maven.connection.retryCount
Number of connection retries after failure is detected in HTTP client. Default is 3.
io.fabric8.maven.defaultRepositories
Specifies a list of default (local) Maven repositories that are checked before looking up the remote repositories. Specified as a comma-separated list of file: repository URLs, where each repository URL has the syntax defined in the section called “Repository URL syntax”.
The default profile sets this property to reference the org.ops4j.pax.url.mvn.defaultRepositories property from the io.fabric8.agent PID.
io.fabric8.maven.globalChecksumPolicy
Specifies the Maven checksumPolicy. The default profile sets this property to warn.
io.fabric8.maven.globalUpdatePolicy
Specifies the Maven updatePolicy, which determines how often Aether attempts to update local Maven artifacts from remote repositories.
The default profile sets this property to daily. If not set, default is daily.
io.fabric8.maven.localRepository
Specifies the local Maven repository, which is used to cache artifacts downloaded from remote repositories (as specified in io.fabric8.maven.repositories).
The default profile sets this property to ${karaf.data}/repository.
io.fabric8.maven.proxies
(Obsolete) This option does not work any more. In older Fabric8 releases it was used to configure a HTTP proxy port.
io.fabric8.maven.repositories
Specifies a list of remote Maven repositories that can be searched for Maven artifacts. This setting normally references the contents of the io.fabric8.agent/org.ops4j.pax.url.mvn.repositories property.
If you decide to use a Maven settings.xml file to configure the Fabric8 agent (see Section 20.5, “Configuring Maven Proxies and HTTP Proxies through settings.xml”), you can combine the remote repositories specified in this setting and the remote repositories configured in a settings.xml file using a special syntax for the list of repository URLs. In this case, you prefix a single + character to the comma-separated list of repository URLs, where the repository URLs are listed on a single line (the \ line continuation character is not supported in this syntax). For example: 
io.fabric8.maven.repositories=+http://repo1.maven.org/maven2@id=maven.central.repo,https://maven.repository.redhat.com/ga@id=redhat.ga.repo,https://maven.repository.redhat.com/earlyaccess/all@id=redhat.ea.repo,https://repository.jboss.org/nexus/content/groupsea@id=fuseearlyaccess
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io.fabric8.maven.settings
Specifies a path on the file system to override the default location of the Maven settings.xml file.
The default profile sets this property to ${karaf.etc}/maven-settings.xml.
io.fabric8.maven.useFallbackRepositories
This option is deprecated and should always be set to false.
The default profile sets this property to false.
io.fabric8.maven.socket.connectionTimeout
Timeout in milliseconds when establishing a HTTP connection during artifact resolution.
io.fabric8.maven.socket.keepAlive
SO_KEEPALIVE option for sockets. Defaults to false.
io.fabric8.maven.socket.linger
SO_LINGER option for sockets. Defaults to -1.
io.fabric8.maven.socket.readTimeout
Timeout in milliseconds when reading data after connecting to a remote repository.
io.fabric8.maven.socket.reuseAddress
SO_REUSEADDR option for sockets. Defaults to false.
io.fabric8.maven.socket.tcpNoDelay
TCP_NODELAY option for sockets. Defaults to true.
io.fabric8.maven.timeout
Default value for connection and read timeouts, when socket.readTimeout and socket.connectionTimeout are not specified.

io.fabric8.maven.proxy PID
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The io.fabric8.maven.proxy PID configures the Fabric8 Maven proxy server and supports the following properties:
appendSystemRepos
The fabric profile sets this property to false.
role
Specifies a comma-separated list of security roles that are allowed to access the Maven proxy server. For details of role-based access control, see section "Role-Based Access Control" in "Security Guide".
The default profile sets this property to the following list: 
admin,manager,viewer,Monitor,Operator,Maintainer,Deployer,Auditor,Administrator,SuperUser
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updatePolicy
Specifies the Maven updatePolicy.
The fabric profile sets this property to always.
uploadRepository
Specifies the location of the directory used to store artifacts uploaded to the Maven proxy server.
The fabric profile sets this property to ${runtime.data}/maven/upload.
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