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Date: Mon, 20 Feb 2012 05:57:34 +0000 (UTC)
From: "Russell E Glaue (Commented) (JIRA)" <jira@apache.org>
To: dev@geronimo.apache.org
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Subject: [jira] [Commented] (GERONIMO-6275) Defining and Using
 org.apache.geronimo.server.dir versus org.apache.geronimo.home.dir in shell
 scripts
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    [ https://issues.apache.org/jira/browse/GERONIMO-6275?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13211683#comment-13211683 ] 

Russell E Glaue commented on GERONIMO-6275:
-------------------------------------------

The "# Resolve the full path to GERONIMO_SERVER" section is copied from the $PRG resolution logic just a dozen lines prior in the section titled "# resolve links - $0 may be a softlink".

I have concern that putting path resolution code in a file identified/named for java environment purposes (setjavaenv) could lead to confusion. Also, we would still be duplicating the "resolution" code since it is identical to the existing duplicated code that resolves GERONIMO_HOME in each of those same shell files (because I just copied it).

I hesitated in modifying existing code lines, so I went for the copy-and-paste. The ideal resolution is probably to move the $PRG/$GERONIMO_HOME resolution code into a function.

{noformat:borderStyle=solid}
RESOLVE_PATH=  # Global return variable for resolvePath()
resolvePath () {
  LPRG=$1
  [ ! -d $LPRG ] && return 1
  while [ -h "$LPRG" ]; do
    ls=`ls -ld "$LPRG"`
    link=`expr "$ls" : '.*-> \(.*\)$'`
    if expr "$link" : '/.*' > /dev/null; then
      LPRG="$link"
    else
      LPRG=`dirname "$LPRG"`/"$link"
    fi
  done
  RESOLVE_PATH="$LPRG"
  return 0
}

# resolve links - $0 may be a softlink
resolvePath "$0" && PRG="$RESOLVE_PATH"

# Get standard environment variables
PRGDIR=`dirname "$PRG"`

# Only set GERONIMO_HOME if not already set
[ -z "$GERONIMO_HOME" ] && GERONIMO_HOME=`cd "$PRGDIR/.." ; pwd`

# Set GERONIMO_SERVER if not already set, otherwise resolve the full path
if [ -z "$GERONIMO_SERVER" ] ; then
  GERONIMO_SERVER="$GERONIMO_HOME"
else
  ATTEMPTED_SERVER="$GERONIMO_SERVER"
  resolvePath `cd "$GERONIMO_HOME"; cd $GERONIMO_SERVER 2>/dev/null && pwd` && GERONIMO_SERVER="$RESOLVE_PATH"
  [ -z "$GERONIMO_SERVER" ] && echo "ERROR: GERONIMO_SERVER: $ATTEMPTED_SERVER not found!" && exit 1
fi
{noformat}

Unfortunately, bash functions cannot return strings, only an exit/return status in $?. So we would have to use a global variable. Anyone have a more efficient idea for doing this?

                
> Defining and Using org.apache.geronimo.server.dir versus org.apache.geronimo.home.dir in shell scripts
> ------------------------------------------------------------------------------------------------------
>
>                 Key: GERONIMO-6275
>                 URL: https://issues.apache.org/jira/browse/GERONIMO-6275
>             Project: Geronimo
>          Issue Type: Sub-task
>      Security Level: public(Regular issues) 
>          Components: startup/shutdown
>    Affects Versions: 3.0-beta-1
>         Environment: Linux x86, Red Hat Enterprise Linux Server release 5.4 (Tikanga); Java JDK1.6.0_25
>            Reporter: Russell E Glaue
>            Assignee: Russell E Glaue
>            Priority: Minor
>              Labels: geronimo
>         Attachments: geronimo-6275-procrun_service.patch, geronimo-6275.patch
>
>
> Related: GERONIMO-6270, GERONIMO-6175, GERONIMO-6174, GERONIMO-5987, GERONIMO-4229
> It would be easier to support multiple server instances of Geronimo if there is one shell variable that is used to reference the path on disk to the instance, proposed as GERONIMO_SERVER as opposed to the GERONIMO_HOME installation path. This issue tracks the discussion and modification of such a change.
> GERONIMO_SERVER defines:
> - GERONIMO_SERVER defaults to GERONIMO_HOME if no instances are specified
> - GERONIMO_SERVER is expanded to GERONIMO_HOME/GERONIMO_SERVER if GERONIMO_SERVER is a relative path
> - GERONIMO_SERVER defines org.apache.geronimo.server.dir
> In the java code there are the following properties:
> # org.apache.geronimo.home.dir - equivelant to GERONIMO_HOME shell variable
> # org.apache.geronimo.server.dir - proposed to be equivelant to GERONIMO_SERVER 
> The words "BASE" versus "HOME" appear a few times in the source. Once example is "karaf.home" and "karaf.base" properties. According to the code usage, it is aparant that these terms are assumed to mean these things:
> # HOME - path location on disk of read-only binaries and configuration
> # BASE - path location on disk of read-write configuration and data storage
> The term BASE is intended to point at a Geronimo Server Instance Base path. However, this has not been clearly defined, and has appeared to cause some misusage. Thus this and other issues lead to the removal of GERONIMO_BASE shell variable and org.apache.geronimo.base.dir java property in GERONIMO-4229 .
> Currently, to start a Geronimo Instance, the org.apache.geronimo.server.dir java property must be defined in the GERONIMO_OPTS variable. However, this prevents the Shell scripts from being able to know and use the path location to the Geronimo Server Instance.
> In particular, there are a few issues affected by a variable like this not being available.
> # Reported in GERONIMO-6174 - GERONIMO_TMPDIR is set in the shell/bat scripts as GERONIMO_HOME/var/tmp. In turn, the java property "java.io.tmpdir" is set to GERONIMO_TMPDIR (this is GERONIMO_HOME/var/tmp). Shouldn't GERONIMO_TMPDIR instead be set to a value provided by GERONIMO_SERVER/var/tmp ?
> -- affected scripts: client, deploy, geronimo, internalLauncher, jaxws-tools
> -- This can be argued to whether or not all Geronimo Server Instance should share a common temp directory.
> # Reported in GERONIMO-6174 - The java properties karaf.home and karaf.base are both being set to GERONIMO_HOME. When instead karaf.base should be set to a value held by GERONIMO_SERVER.
> -- affected scripts: client, geronimo, internalLauncher
> -- see resulting errors and reasoning in GERONIMO-6174
> # Not Reported - The java property java.util.logging.config.file is being set to GERONIMO_HOME/etc/java.util.logging.properties . It is intended to be an empty configuration file. This only causes a problem when using instances if GERONIMO_HOME/etc does not exist (it would not exist if GERONIMO_SERVER/etc is intended to be used).
> -- affected scripts: client, geronimo, internalLauncher
> # Not Reported - Logging startup output to GERONIMO_HOME/var/log/geronimo.out - Obviously if multiple instances are being started, this should be GERONIMO_SERVER/var/log/geronimo.out . Any error is silent if var/log/geronimo.out does not exist.
> -- affected scripts: geronimo
> # Not Reported - The register-service script does a grep and awk on GERONIMO_HOME/var/config/config-substitutions.properties to discover the portOffset . Obviously this will not work for multiple instances
> -- The register-service script does not take multiple instances into consideration at all
> -- affected scripts: register-service
> Solution:
> - Create a new shell variable GERONIMO_SERVER to hold the path location to the run-time server configuration, and leave GERONIMO_HOME to hold the path location to the Geronimo Installation Path.
> Arguments:
> - If GERONIMO_SERVER defaults to GERONIMO_HOME, then any installation not having multiple instances configured will not be affected.
> - This will not resolve the multiple instance support issue in Geronimo, GERONIMO-6270, but having this support in the shell scripts will get Geronimo much closer.
> - About half of the currently known issues (listed above) can be resolved with the addition of GERONIMO_SERVER as proposed.
> The remaining currently known issues will be:
> # GERONIMO-6174: the proper use of karaf.home versus karaf.base
> # GERONIMO-6270 SnapshotConfigXMLBuilder using the org.apache.geronimo.server.dir/var directory
> # GERONIMO-5987 and GERONIMO-6270: ActiveMQ using org.apache.geronimo.server.dir as the base for var rather than the current working directory the run-time server is in at startup
> # GERONIMO-6175: The Geronimo Repository using org.apache.geronimo.server.dir instead of org.apache.geronimo.home.dir

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