#!/usr/bin/env bash

# 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.


# The Hama command script
#
# Environment Variables
#
#   JAVA_HOME        The java implementation to use.  Overrides JAVA_HOME.
#
#   HAMA_CLASSPATH Extra Java CLASSPATH entries.
#
#   HAMA_HEAPSIZE  The maximum amount of heap to use, in MB. 
#                    Default is 1000.
#
#   HAMA_OPTS      Extra Java runtime options.
#   
#   HAMA_NAMENODE_OPTS       These options are added to HAMA_OPTS 
#   HAMA_CLIENT_OPTS         when the respective command is run.
#   HAMA_{COMMAND}_OPTS etc  HAMA_JT_OPTS applies to JobTracker 
#                              for e.g.  HAMA_CLIENT_OPTS applies to 
#                              more than one command (fs, dfs, fsck, 
#                              dfsadmin etc)  
#
#   HAMA_CONF_DIR  Alternate conf dir. Default is ${HAMA_HOME}/conf.
#
#   HAMA_ROOT_LOGGER The root appender. Default is INFO,console
#

bin=`dirname "$0"`
bin=`cd "$bin"; pwd`

. "$bin"/hama-config.sh

cygwin=false
case "`uname`" in
CYGWIN*) cygwin=true;;
esac

# if no args specified, show usage
if [ $# = 0 ]; then
  echo "Usage: hama [--config confdir] COMMAND"
  echo "where COMMAND is one of:"
  echo "  bspmaster            run the BSP Master node"
  echo "  groom                run the Groom node"
  echo "  zookeeper            run a Zookeeper server"
  echo "  job                  manipulate BSP jobs"
  echo "  jar <jar>            run a jar file"
  echo " or"
  echo "  CLASSNAME            run the class named CLASSNAME"
  echo "Most commands print help when invoked w/o parameters."
  exit 1
fi

# get arguments
COMMAND=$1
shift

if [ -f "${HAMA_CONF_DIR}/hama-env.sh" ]; then
  . "${HAMA_CONF_DIR}/hama-env.sh"
fi

# some Java parameters
if [ "$JAVA_HOME" != "" ]; then
  #echo "run java in $JAVA_HOME"
  JAVA_HOME=$JAVA_HOME
fi
  
if [ "$JAVA_HOME" = "" ]; then
  echo "Error: JAVA_HOME is not set."
  exit 1
fi

JAVA=$JAVA_HOME/bin/java
JAVA_HEAP_MAX=-Xmx1000m 

# check envvars which might override default args
if [ "$HAMA_HEAPSIZE" != "" ]; then
  #echo "run with heapsize $HAMA_HEAPSIZE"
  JAVA_HEAP_MAX="-Xmx""$HAMA_HEAPSIZE""m"
  #echo $JAVA_HEAP_MAX
fi

# CLASSPATH initially contains $HAMA_CONF_DIR
CLASSPATH="${HAMA_CONF_DIR}"
CLASSPATH=${CLASSPATH}:$JAVA_HOME/lib/tools.jar

# for developers, add Hama classes to CLASSPATH
if [ -d "$HAMA_HOME/core/target/classes" ]; then
  CLASSPATH=${CLASSPATH}:$HAMA_HOME/core/target/classes
fi
if [ -d "$HAMA_HOME/core/target/test-classes/classes" ]; then
  CLASSPATH=${CLASSPATH}:$HAMA_HOME/core/target/test-classes
fi

# for developers, add Graph classes to CLASSPATH
if [ -d "$HAMA_HOME/graph/target/classes" ]; then
  CLASSPATH=${CLASSPATH}:$HAMA_HOME/graph/target/classes
fi
if [ -d "$HAMA_HOME/graph/target/test-classes/classes" ]; then
  CLASSPATH=${CLASSPATH}:$HAMA_HOME/graph/target/test-classes
fi

# so that filenames w/ spaces are handled correctly in loops below
IFS=

# for releases, add core hama jar to CLASSPATH
for f in $HAMA_HOME/hama-**.jar; do
  CLASSPATH=${CLASSPATH}:$f;
done

# add libs to CLASSPATH
for f in $HAMA_HOME/lib/*.jar; do
  CLASSPATH=${CLASSPATH}:$f;
done

# add user-specified CLASSPATH last
if [ "$HAMA_CLASSPATH" != "" ]; then
  CLASSPATH=${CLASSPATH}:${HAMA_CLASSPATH}
fi

# default log directory & file
if [ "$HAMA_LOG_DIR" = "" ]; then
  HAMA_LOG_DIR="$HAMA_HOME/logs"
fi
if [ "$HAMA_LOGFILE" = "" ]; then
  HAMA_LOGFILE='hama.log'
fi

# default policy file for service-level authorization
if [ "$HAMA_POLICYFILE" = "" ]; then
  HAMA_POLICYFILE="hama-policy.xml"
fi

# restore ordinary behaviour
unset IFS

# figure out which class to run
if [ "$COMMAND" = "bspmaster" ] ; then
  CLASS='org.apache.hama.BSPMasterRunner'
  BSP_OPTS="$BSP_OPTS $BSP_BSPMASTER_OPTS"
elif [ "$COMMAND" = "groom" ] ; then
  CLASS='org.apache.hama.GroomServerRunner'
  BSP_OPTS="$BSP_OPTS $BSP_GROOMSERVER_OPTS"
elif [ "$COMMAND" = "zookeeper" ] ; then
  CLASS='org.apache.hama.ZooKeeperRunner'
elif [ "$COMMAND" = "job" ] ; then
  CLASS='org.apache.hama.bsp.BSPJobClient'
elif [ "$COMMAND" = "jar" ] ; then
  CLASS=org.apache.hama.util.RunJar
  BSP_OPTS="$BSP_OPTS"
else
  CLASS=$COMMAND
fi

# cygwin path translation
if $cygwin; then
  CLASSPATH=`cygpath -p -w "$CLASSPATH"`
  HAMA_HOME=`cygpath -w "$HAMA_HOME"`
  HAMA_LOG_DIR=`cygpath -w "$HAMA_LOG_DIR"`
  TOOL_PATH=`cygpath -p -w "$TOOL_PATH"`
fi

# cygwin path translation
if $cygwin; then
  JAVA_LIBRARY_PATH=`cygpath -p "$JAVA_LIBRARY_PATH"`
fi

HAMA_OPTS="$HAMA_OPTS -Dhama.log.dir=$HAMA_LOG_DIR"
HAMA_OPTS="$HAMA_OPTS -Dhama.log.file=$HAMA_LOGFILE"
HAMA_OPTS="$HAMA_OPTS -Dhama.home.dir=$HAMA_HOME"
HAMA_OPTS="$HAMA_OPTS -Dhama.id.str=$HAMA_IDENT_STRING"
HAMA_OPTS="$HAMA_OPTS -Dhama.root.logger=${HAMA_ROOT_LOGGER:-INFO,console}"
if [ "x$JAVA_LIBRARY_PATH" != "x" ]; then
  HAMA_OPTS="$HAMA_OPTS -Djava.library.path=$JAVA_LIBRARY_PATH"
fi  
HAMA_OPTS="$HAMA_OPTS -Dhama.policy.file=$HAMA_POLICYFILE"

# run it
exec "$JAVA" $JAVA_HEAP_MAX $HAMA_OPTS -classpath "$CLASSPATH" $CLASS "$@"