Modify java demo with copy_bom

demos/java/hello_world.yaml

@@ -0,0 +1,9 @@
+includes:
+  - base.yaml
+  - java-11-alibaba-dragonwell.yaml
+targets:
+  # copy java class file
+  - target: /
+    copy:
+      - files:
+        - ../hello_world/Main.class

demos/java/process_builder.yaml

@@ -0,0 +1,15 @@
+includes:
+  - base.yaml
+  - java-11-alibaba-dragonwell.yaml
+targets:
+  # copy java class file
+  - target: /
+    copy:
+      - files:
+        - ../processBuilder/processBuilder.class
+  # copy date used by processBuilder
+  - target: /bin
+    copy:
+      - files:
+        - /bin/date
+  

demos/java/run_java_on_occlum.sh

@@ -36,11 +36,8 @@ init_instance() {
 
 build_web() {
     # Copy JVM and JAR file into Occlum instance and build
-    mkdir -p image/usr/lib/jvm
-    cp -r /opt/occlum/toolchains/jvm/java-11-alibaba-dragonwell image/usr/lib/jvm
-    cp /usr/local/occlum/x86_64-linux-musl/lib/libz.so.1 image/lib
-    mkdir -p image/usr/lib/spring
-    cp ../${jar_path} image/usr/lib/spring/
+    rm -rf image
+    copy_bom -f ../webserver.yaml --root image --include-dir /opt/occlum/etc/template
     occlum build
 }
 
@@ -56,10 +53,8 @@ run_web() {
 
 build_hello() {
     # Copy JVM and class file into Occlum instance and build
-    mkdir -p image/usr/lib/jvm
-    cp -r /opt/occlum/toolchains/jvm/java-11-alibaba-dragonwell image/usr/lib/jvm
-    cp /usr/local/occlum/x86_64-linux-musl/lib/libz.so.1 image/lib
-    cp ../${hello} image
+    rm -rf image
+    copy_bom -f ../hello_world.yaml --root image --include-dir /opt/occlum/etc/template
     occlum build
 }
 
@@ -74,11 +69,8 @@ run_hello() {
 
 build_processBuilder() {
     # Copy JVM and class file into Occlum instance and build
-    mkdir -p image/usr/lib/jvm
-    cp -r /opt/occlum/toolchains/jvm/java-11-alibaba-dragonwell image/usr/lib/jvm
-    cp /usr/local/occlum/x86_64-linux-musl/lib/libz.so.1 image/lib
-    cp ../${app} image
-    cp /bin/date image/bin/
+    rm -rf image
+    copy_bom -f ../process_builder.yaml --root image --include-dir /opt/occlum/etc/template
     # Need bigger user space size for multiprocess
     new_json="$(jq '.resource_limits.user_space_size = "6000MB"' Occlum.json)" && \
     echo "${new_json}" > Occlum.json
@@ -95,6 +87,12 @@ run_processBuilder() {
         -Djdk.lang.Process.launchMechanism=posix_spawn processBuilder
 }
 
+# check if the libz softlink exists. If not, create the softlink to enable autodep for java
+libz_file=/lib/libz.so.1
+if [ ! -f ${libz_file} ];then
+    ln -sf /usr/local/occlum/x86_64-linux-musl/lib/libz.so.1 ${libz_file}
+fi
+
 arg=$1
 case "$arg" in
     web_app)

demos/java/webserver.yaml

@@ -0,0 +1,9 @@
+includes:
+  - base.yaml
+  - java-11-alibaba-dragonwell.yaml
+targets:
+  # copy the web server
+  - target: /usr/lib/spring
+    copy:
+      - files:
+        - ../gs-messaging-stomp-websocket/complete/target/gs-messaging-stomp-websocket-0.1.0.jar

tools/toolchains/java/install_dragonwell.sh

@@ -41,3 +41,6 @@ EOF
 
 chmod +x ${INSTALL_DIR}/bin/occlum-java
 chmod +x ${INSTALL_DIR}/bin/occlum-javac
+
+# create softlink for libz to enable autodep for java
+ln -sf /usr/local/occlum/x86_64-linux-musl/lib/libz.so.1 /lib/libz.so.1