#!/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.
#

BINDIR=$(dirname "$0")
export PULSAR_HOME=`cd -P $BINDIR/..;pwd`

DEFAULT_LOG_CONF=$PULSAR_HOME/conf/log4j2.yaml

# Check for the java to use
if [[ -z $JAVA_HOME ]]; then
    JAVA=$(which java)
    if [ $? != 0 ]; then
        echo "Error: JAVA_HOME not set, and no java executable found in $PATH." 1>&2
        exit 1
    fi
else
    JAVA=$JAVA_HOME/bin/java
fi

PULSAR_MEM=${PULSAR_MEM:-"-Xmx128m -XX:MaxDirectMemorySize=128m"}

# Garbage collection options
PULSAR_GC=${PULSAR_GC:-"-XX:+UseZGC -XX:+PerfDisableSharedMem -XX:+AlwaysPreTouch"}

# Garbage collection log.
IS_JAVA_8=$( $JAVA -version 2>&1 | grep version | grep '"1\.8' )
if [[ -z "$IS_JAVA_8" ]]; then
  # >= JDK 9
  PULSAR_GC_LOG=${PULSAR_GC_LOG:-"-Xlog:gc:logs/pulsar_gc_%p.log:time,uptime:filecount=10,filesize=20M"}
  # '--add-opens' option is not supported in JDK 1.8
  OPTS="$OPTS --add-opens java.base/sun.net=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED"
else
  # == JDK 1.8
  PULSAR_GC_LOG=${PULSAR_GC_LOG:-"-Xloggc:logs/pulsar_gc_%p.log -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=20M"}
fi

# Extra options to be passed to the jvm
PULSAR_EXTRA_OPTS=${PULSAR_EXTRA_OPTS:-" -Dpulsar.allocator.exit_on_oom=true -Dio.netty.recycler.maxCapacityPerThread=4096"}

if [ -z "$PULSAR_LOG_CONF" ]; then
    PULSAR_LOG_CONF=$DEFAULT_LOG_CONF
fi

add_maven_deps_to_classpath() {
    MVN="mvn"
    if [ "$MAVEN_HOME" != "" ]; then
	    MVN=${MAVEN_HOME}/bin/mvn
    fi

    # Need to generate classpath from maven pom. This is costly so generate it
    # and cache it. Save the file into our target dir so a mvn clean will get
    # clean it up and force us create a new one.
    f="${PULSAR_HOME}/distribution/server/target/classpath.txt"
    if [ ! -f "${f}" ]
    then
    (
      cd "${PULSAR_HOME}"
      ${MVN} -pl distribution/server generate-sources &> /dev/null
    )
    fi
    PULSAR_CLASSPATH=${CLASSPATH}:`cat "${f}"`
}

if [ -d "$PULSAR_HOME/lib" ]; then
    PULSAR_CLASSPATH="$PULSAR_CLASSPATH:$PULSAR_HOME/lib/*"
else
    add_maven_deps_to_classpath
fi

PULSAR_CLASSPATH="$PULSAR_JAR:$PULSAR_CLASSPATH:$PULSAR_EXTRA_CLASSPATH"
PULSAR_CLASSPATH="`dirname $PULSAR_LOG_CONF`:$PULSAR_CLASSPATH"
OPTS="$OPTS -Dlog4j.configurationFile=`basename $PULSAR_LOG_CONF`"

# Allow Netty to use reflection access
OPTS="$OPTS -Dio.netty.tryReflectionSetAccessible=true"

# Start --add-opens options
# '--add-opens' option is not supported in jdk8
if [[ -z "$IS_JAVA_8" ]]; then
  # Netty: enable java.nio.DirectByteBuffer
  # https://github.com/netty/netty/blob/4.1/common/src/main/java/io/netty/util/internal/PlatformDependent0.java
  # https://github.com/netty/netty/issues/12265
  OPTS="$OPTS --add-opens java.base/java.nio=ALL-UNNAMED --add-opens java.base/jdk.internal.misc=ALL-UNNAMED"
fi

# Ensure we can read bigger content from ZK. (It might be
# rarely needed when trying to list many z-nodes under a
# directory)
OPTS="$OPTS -Djute.maxbuffer=10485760 -Djava.net.preferIPv4Stack=true"

OPTS="-cp $PULSAR_CLASSPATH $OPTS"

# we should exit on OOM for localrun especially when using ThreadRuntime
PULSAR_EXTRA_OPTS="$PULSAR_EXTRA_OPTS -XX:+ExitOnOutOfMemoryError"

OPTS="$OPTS $PULSAR_EXTRA_OPTS $PULSAR_MEM $PULSAR_GC"

# functions related variables
FUNCTIONS_HOME=$PULSAR_HOME/pulsar-functions
DEFAULT_JAVA_INSTANCE_JAR=$PULSAR_HOME/instances/java-instance.jar
JAVA_INSTANCE_JAR=${PULSAR_JAVA_INSTANCE_JAR:-"${DEFAULT_JAVA_INSTANCE_JAR}"}
DEFAULT_PY_INSTANCE_FILE=$PULSAR_HOME/instances/python-instance/python_instance_main.py
PY_INSTANCE_FILE=${PULSAR_PY_INSTANCE_FILE:-"${DEFAULT_PY_INSTANCE_FILE}"}

# find the java instance location
if [ ! -f "${JAVA_INSTANCE_JAR}" ]; then
    # didn't find a released jar, then search the built jar
    BUILT_JAVA_INSTANCE_JAR="${FUNCTIONS_HOME}/runtime-all/target/java-instance.jar"
    if [ -f "${BUILT_JAVA_INSTANCE_JAR}" ]; then
        JAVA_INSTANCE_JAR=${BUILT_JAVA_INSTANCE_JAR}
    else
        echo "\nCouldn't find pulsar java instance jar.";
        echo "Make sure you've run 'mvn package'\n";
        exit 1;
    fi
fi

# find the python instance location
if [ ! -f "${PY_INSTANCE_FILE}" ]; then
    # didn't find a released python instance, then search the built python instance
    BUILT_PY_INSTANCE_FILE="${FUNCTIONS_HOME}/instance/target/python-instance/python_instance_main.py"
    if [ -f "${BUILT_PY_INSTANCE_FILE}" ]; then
        PY_INSTANCE_FILE=${BUILT_PY_INSTANCE_FILE}
    else
        echo "\nCouldn't find pulsar python instance.";
        echo "Make sure you've run 'mvn package'\n";
        exit 1;
    fi
fi

# functions
OPTS="$OPTS -Dpulsar.functions.java.instance.jar=${JAVA_INSTANCE_JAR}"
OPTS="$OPTS -Dpulsar.functions.python.instance.file=${PY_INSTANCE_FILE}"

MAINCLASS="org.apache.pulsar.functions.LocalRunner"

#Change to PULSAR_HOME to support relative paths
cd "$PULSAR_HOME"

exec $JAVA $OPTS $MAINCLASS "$@"