From b9eef8caa4b5f81b9512763a7bb797c630c8918e Mon Sep 17 00:00:00 2001
From: Liu-HongYe <Liu-HongYe@Outlook.com>
Date: Sun, 23 Dec 2018 15:42:49 +0800
Subject: [PATCH 1/3] Dynamically setting the JVM memory limit by reading the
 Cgroup configuration during container startup.

---
 core/java8/Dockerfile |  3 ++-
 core/java8/init.sh    | 17 +++++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)
 create mode 100644 core/java8/init.sh

diff --git a/core/java8/Dockerfile b/core/java8/Dockerfile
index 71ece46b..54afb37f 100644
--- a/core/java8/Dockerfile
+++ b/core/java8/Dockerfile
@@ -37,4 +37,5 @@ RUN cd /javaAction \
 	&& rm -rf /javaAction/src \
 	&& ./compileClassCache.sh
 
-CMD ["java", "-Dfile.encoding=UTF-8", "-Xshareclasses:cacheDir=/javaSharedCache,readonly", "-Xquickstart", "-jar", "/javaAction/build/libs/javaAction-all.jar"]
+ADD init.sh ./
+CMD ["./init.sh"]
\ No newline at end of file
diff --git a/core/java8/init.sh b/core/java8/init.sh
new file mode 100644
index 00000000..07c19345
--- /dev/null
+++ b/core/java8/init.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+limit_in_bytes=$(cat /sys/fs/cgroup/memory/memory.limit_in_bytes)
+heap_size=64
+export JAVA_OPTS="-Dfile.encoding=UTF-8 -Xshareclasses:cacheDir=/javaSharedCache,readonly -Xquickstart"
+export RESERVED_MEGABYTES=64
+
+# If not default limit_in_bytes in cgroup
+if [ "$limit_in_bytes" -ne "9223372036854771712" ]
+then
+    limit_in_megabytes=$(expr $limit_in_bytes \/ 1048576)
+    heap_size=$(expr $limit_in_megabytes - $RESERVED_MEGABYTES)
+    export JAVA_OPTS="-Xmx${heap_size}m $JAVA_OPTS"
+fi
+
+echo JAVA_OPTS= $JAVA_OPTS
+
+java $JAVA_OPTS -jar /javaAction/build/libs/javaAction-all.jar

From e5c4f95f68b1de6930427713b9bb5834ce9eda13 Mon Sep 17 00:00:00 2001
From: Liu-HongYe <Liu-HongYe@Outlook.com>
Date: Sun, 23 Dec 2018 15:58:26 +0800
Subject: [PATCH 2/3] # add license head

---
 core/java8/init.sh | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/core/java8/init.sh b/core/java8/init.sh
index 07c19345..28a2a8c3 100644
--- a/core/java8/init.sh
+++ b/core/java8/init.sh
@@ -1,4 +1,21 @@
-#!/bin/bash
+#!/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.
+#
+
 limit_in_bytes=$(cat /sys/fs/cgroup/memory/memory.limit_in_bytes)
 heap_size=64
 export JAVA_OPTS="-Dfile.encoding=UTF-8 -Xshareclasses:cacheDir=/javaSharedCache,readonly -Xquickstart"

From 9da41928e17c593bf54ee412ea5670e2409f556b Mon Sep 17 00:00:00 2001
From: Liu-HongYe <Liu-HongYe@Outlook.com>
Date: Sun, 23 Dec 2018 16:19:21 +0800
Subject: [PATCH 3/3] # permission denied

---
 core/java8/Dockerfile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core/java8/Dockerfile b/core/java8/Dockerfile
index 54afb37f..d3ea6a31 100644
--- a/core/java8/Dockerfile
+++ b/core/java8/Dockerfile
@@ -38,4 +38,5 @@ RUN cd /javaAction \
 	&& ./compileClassCache.sh
 
 ADD init.sh ./
+RUN chmod 777 ./init.sh
 CMD ["./init.sh"]
\ No newline at end of file