#!/bin/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.
#

#
# This is a collection of utility functions to be used in other Ignite scripts.
# Before calling any function from this file you have to import it:
#   if [ "${IGNITE_HOME}" = "" ];
#       then IGNITE_HOME_TMP="$(dirname "$(cd "$(dirname "$0")"; "pwd")")";
#       else IGNITE_HOME_TMP=${IGNITE_HOME};
#   fi
#
#   source "${IGNITE_HOME_TMP}"/bin/include/functions.sh
#

#
# Discovers path to Java executable and checks it's version.
# The function exports JAVA variable with path to Java executable.
#
checkJava() {
    # Check JAVA_HOME.
    if [ "$JAVA_HOME" = "" ]; then
        JAVA=`type -p java`
        RETCODE=$?

        if [ $RETCODE -ne 0 ]; then
            echo $0", ERROR:"
            echo "JAVA_HOME environment variable is not found."
            echo "Please point JAVA_HOME variable to location of JDK 1.7 or JDK 1.8."
            echo "You can also download latest JDK at http://java.com/download"

            exit 1
        fi

        JAVA_HOME=
    else
        JAVA=${JAVA_HOME}/bin/java
    fi

    #
    # Check JDK.
    #
    if [ ! -e "$JAVA" ]; then
        echo $0", ERROR:"
        echo "JAVA is not found in JAVA_HOME=$JAVA_HOME."
        echo "Please point JAVA_HOME variable to installation of JDK 1.7 or JDK 1.8."
        echo "You can also download latest JDK at http://java.com/download"

        exit 1
    fi

    JAVA_VER=`"$JAVA" -version 2>&1 | egrep "1\.[78]\."`

    if [ "$JAVA_VER" == "" ]; then
        echo $0", ERROR:"
        echo "The version of JAVA installed in JAVA_HOME=$JAVA_HOME is incorrect."
        echo "Please point JAVA_HOME variable to installation of JDK 1.7 or JDK 1.8."
        echo "You can also download latest JDK at http://java.com/download"

        exit 1
    fi
}

#
# Discovers IGNITE_HOME environment variable.
# The function expects IGNITE_HOME_TMP variable is set and points to the directory where the callee script resides.
# The function exports IGNITE_HOME variable with path to Ignite home directory.
#
setIgniteHome() {
    #
    # Set IGNITE_HOME, if needed.
    #
    if [ "${IGNITE_HOME}" = "" ]; then
        export IGNITE_HOME=${IGNITE_HOME_TMP}
    fi

    #
    # Check IGNITE_HOME is valid.
    #
    if [ ! -d "${IGNITE_HOME}/config" ]; then
        echo $0", ERROR:"
        echo "Ignite installation folder is not found or IGNITE_HOME environment variable is not valid."
        echo "Please create IGNITE_HOME environment variable pointing to location of Ignite installation folder."

        exit 1
    fi

    #
    # Check IGNITE_HOME points to current installation.
    #
    if [ "${IGNITE_HOME}" != "${IGNITE_HOME_TMP}" ] &&
       [ "${IGNITE_HOME}" != "${IGNITE_HOME_TMP}/" ]; then
        echo $0", WARN: IGNITE_HOME environment variable may be pointing to wrong folder: $IGNITE_HOME"
    fi
}

#
# Finds available port for JMX.
# The function exports JMX_MON variable with Java JMX options.
#
findAvailableJmxPort() {
    JMX_PORT=`"$JAVA" -cp "${IGNITE_LIBS}" org.apache.ignite.internal.util.portscanner.GridJmxPortFinder`

    #
    # This variable defines necessary parameters for JMX
    # monitoring and management.
    #
    # This enables remote unsecure access to JConsole or VisualVM.
    #
    # ADD YOUR ADDITIONAL PARAMETERS/OPTIONS HERE
    #
    if [ -n "$JMX_PORT" ]; then
        JMX_MON="-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=${JMX_PORT} \
            -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false"
    else
        # If JMX port wasn't found do not initialize JMX.
        echo "$0, WARN: Failed to resolve JMX host (JMX will be disabled): $HOSTNAME"
        JMX_MON=""
    fi
}

#
# Gets correct Java class path separator symbol for the given platform.
# The function exports SEP variable with class path separator symbol.
#
getClassPathSeparator() {
    SEP=":";

    case "`uname`" in
        MINGW*)
            SEP=";";
            export IGNITE_HOME=`echo $IGNITE_HOME | sed -e 's/^\/\([a-zA-Z]\)/\1:/'`
            ;;
        CYGWIN*)
            SEP=";";
            export IGNITE_HOME=`echo $IGNITE_HOME | sed -e 's/^\/\([a-zA-Z]\)/\1:/'`
            ;;
    esac
}