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#
# Script looking for a Java runtime suitable for running Tomcat
#
# The script looks for the default JRE/JDK, OpenJDK and Oracle JDK
# as packaged by java-package. The Java runtime found is exported
# in the JAVA_HOME environment variable.
#
set -e
# Find the Java runtime if JAVA_HOME isn't already defined
if [ -z "$JAVA_HOME" ]; then
# This function sets the variable JDK_DIRS
find_jdks()
{
for java_version in 25 24 23 22 21 17 11
do
for jvmdir in /usr/lib/jvm/java-${java_version}-openjdk-* \
/usr/lib/jvm/jdk-${java_version}-oracle-* \
/usr/lib/jvm/jre-${java_version}-oracle-* \
/usr/lib/jvm/java-${java_version}-oracle \
/usr/lib/jvm/oracle-java${java_version}-jdk-* \
/usr/lib/jvm/oracle-java${java_version}-jre-*
do
if [ -d "${jvmdir}" ]
then
JDK_DIRS="${JDK_DIRS} ${jvmdir}"
fi
done
done
}
# The first existing directory is used for JAVA_HOME
JDK_DIRS="/usr/lib/jvm/default-java"
find_jdks
# Look for the right JVM to use
for jdir in $JDK_DIRS; do
if [ -r "$jdir/bin/java" -a -z "${JAVA_HOME}" ]; then
JAVA_HOME="$jdir"
fi
done
fi
if [ -z "$JAVA_HOME" ]; then
echo "<2>No JDK or JRE found - Please set the JAVA_HOME variable or install the default-jdk package"
exit 1
fi
export JAVA_HOME
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