#!/bin/sh

# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# OS specific support.  $var _must_ be set to either true or false.
cygwin=false
os400=false
darwin=false
case "`uname`" in
CYGWIN*) cygwin=true;;
OS400*) os400=true;;
Darwin*) darwin=true;;
esac

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

while [ -h "$PRG" ]; do
  ls=`ls -ld "$PRG"`
  link=`expr "$ls" : '.*-> \(.*\)$'`
  if expr "$link" : '/.*' > /dev/null; then
    PRG="$link"
  else
    PRG=`dirname "$PRG"`/"$link"
  fi
done

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

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

# Get OODT environment set up
if [ -r "$OODT_HOME"/bin/env.sh ]; then
  . "$OODT_HOME"/bin/env.sh
fi

# Only set WORKFLOW_HOME if not already set
if [ -z "$WORKFLOW_HOME" ]; then
  WORKFLOW_HOME="$OODT_HOME"/workflow
  export WORKFLOW_HOME
fi

if [ -z "$WORKFLOW_PID" ]; then
  WORKFLOW_PID="$WORKFLOW_HOME"/run/cas.workflow.pid
fi

# For Cygwin, ensure paths are in UNIX format before anything is touched
if $cygwin; then
  [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
  [ -n "$JRE_HOME" ] && JRE_HOME=`cygpath --unix "$JRE_HOME"`
  [ -n "$OODT_HOME" ] && OODT_HOME=`cygpath --unix "$OODT_HOME"`
  [ -n "$WORKFLOW_HOME" ] && WORKFLOW_HOME=`cygpath --unix "$WORKFLOW_HOME"`
  [ -n "$CLASSPATH" ] && CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
fi

if [ "$1" = "start" ]; then
  if [ ! -z "$WORKFLOW_PID" ]; then
    if [ -f "$WORKFLOW_PID" ]; then
      echo "PID file ($WORKFLOW_PID) found. Is Workflow Manager still running? Start aborted."
      exit 1
    fi
  fi

  # In case this script was run from somewhere else cd to this directory
  cd "$WORKFLOW_HOME"/bin

  "$_RUNJAVA" $JAVA_OPTS $OODT_OPTS \
    -Djava.ext.dirs="$WORKFLOW_HOME"/lib \
    -Djava.util.logging.config.file="$WORKFLOW_HOME"/etc/logging.properties \
    -Dorg.apache.oodt.cas.workflow.properties="$WORKFLOW_HOME"/etc/workflow.properties \
    -Djava.io.tmpdir="$OODT_TMPDIR" \
    -Dorg.apache.oodt.cas.pge.task.metkeys.legacyMode="true" \
    -Dorg.apache.oodt.cas.pge.task.status.legacyMode="true" \
    org.apache.oodt.cas.workflow.system.XmlRpcWorkflowManager \
    --portNum "$WORKFLOW_PORT" 2>&1 &

  if [ ! -z "$WORKFLOW_PID" ]; then
    echo $! > $WORKFLOW_PID
  fi

  if [ $have_tty -eq 1 ]; then
    echo "Workflow Manager started PID file ($WORKFLOW_PID)."
  fi

elif [ "$1" = "stop" ]; then

  shift

  SLEEP=5
  if [ ! -z "$1" ]; then
    echo $1 | grep "[^0-9]" > /dev/null 2>&1
    if [ $? -eq 1 ]; then
      SLEEP=$1
      shift
    fi
  fi

  FORCE=0
  if [ "$1" = "-force" ]; then
    shift
    FORCE=1
  fi

  if [ ! -z "$WORKFLOW_PID" ]; then
    if [ -f "$WORKFLOW_PID" ]; then
      kill `cat $WORKFLOW_PID` >/dev/null 2>&1
      if [ $? -eq 1 ]; then
        echo "PID file ${WORKFLOW_PID} found with PID `cat $WORKFLOW_PID` but no matching process was found. Removed ${WORKFLOW_PID}, now Workflow Manager can be started."
        rm ${WORKFLOW_PID}
        exit 1
      fi
    else
      echo "\$WORKFLOW_PID was set ($WORKFLOW_PID) but the specified file does not exist. Is Workflow Manager running? Stop aborted."
      exit 1
    fi
  fi

  if [ ! -z "$WORKFLOW_PID" ]; then
    if [ -f "$WORKFLOW_PID" ]; then
      while [ $SLEEP -ge 0 ]; do
        kill -0 `cat $WORKFLOW_PID` >/dev/null 2>&1
        if [ $? -eq 1 ]; then
          rm $WORKFLOW_PID
          break
        fi
        if [ $SLEEP -gt 0 ]; then
          sleep 1
        fi
        if [ $SLEEP -eq 0 ]; then
          if [ $FORCE -eq 0 ]; then
            echo "Workflow Manager did not stop in time. PID file was not removed."
          fi
        fi
        SLEEP=`expr $SLEEP - 1 `
      done
    fi
  fi

  if [ $FORCE -eq 1 ]; then
    if [ -z "$WORKFLOW_PID" ]; then
      echo "Kill failed: \$WORKFLOW_PID not set"
    else
      if [ -f "$WORKFLOW_PID" ]; then
        echo "Killing: `cat $WORKFLOW_PID`"
        kill -9 `cat $WORKFLOW_PID`
        rm $WORKFLOW_PID
      fi
    fi
  fi

else
  echo "Usage: wmgr {start|stop}"
  exit 1
fi