Add Docker build for Java sample

Author: joe4dev

lambda-debug-mode/java/base-enable-lambda-debug-mode/.vscode/launch.json

@@ -0,0 +1,13 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Java: Remote Attach",
+            "type": "java",
+            "request": "attach",
+            "hostName": "localhost",
+            "preLaunchTask": "Wait Remote Debugger Server",
+            "port": 5050
+        }
+    ]
+}

lambda-debug-mode/java/base-enable-lambda-debug-mode/.vscode/tasks.json

@@ -0,0 +1,10 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "Wait Remote Debugger Server",
+            "type": "shell",
+            "command": "while [[ -z $(docker ps | grep :5050) ]]; do sleep 1; done; sleep 1;"
+        }
+    ]
+}

lambda-debug-mode/java/base-enable-lambda-debug-mode/Makefile

@@ -3,16 +3,46 @@ export AWS_SECRET_ACCESS_KEY ?= test
 export AWS_DEFAULT_REGION = us-east-1
 VENV_DIR ?= .venv
 
+# https://hub.docker.com/_/gradle/tags
+IMAGE ?= gradle:8.4.0-jdk17
+
 usage:       ## Show this help
 	@fgrep -h "##" $(MAKEFILE_LIST) | fgrep -v fgrep | sed -e 's/\\$$//' | sed -e 's/##//'
 
-build-zip:   ## Build the Lambda funzion zip.
-	cd java-lambda-function/base-enable-lambda-debug-mode/ && ./gradlew buildZip
+install: build-docker
+
+build-docker: ## Build the Lambda function zip in Docker
+	docker run --rm -v "$$(pwd)/java-function:/app" $(IMAGE) bash -c "cd /app && ./gradlew buildZip"
+
+build-local: ## Build the Lambda function zip locally
+	cd java-function && ./gradlew buildZip
+
+clean:
+	rm -rf java-function/build
 
 run:         ## Deploy and invoke the Lambda container locally
 	echo "Deploying Lambda locally"; \
 	./run.sh; \
 	echo "Done - test successfully finished."
 
-.PHONY: usage install run
+start:
+	LOCALSTACK_LAMBDA_DEBUG_MODE=1 \
+	LOCALSTACK_LAMBDA_DEBUG_MODE_CONFIG_PATH=/tmp/lambda_debug_mode_config.yaml \
+	localstack start --volume ${PWD}/lambda_debug_mode_config.yaml:/tmp/lambda_debug_mode_config.yaml -d
+
+stop:
+	@echo
+	localstack stop
+
+ready:
+	@echo Waiting on the LocalStack container...
+	@localstack wait -t 30 && echo Localstack is ready to use! || (echo Gave up waiting on LocalStack, exiting. && exit 1)
+
+logs:
+	@localstack logs > logs.txt
+
+test-ci:
+	make install; return_code=`echo $$?`;\
+	echo "Interactive debugging not tested in CI"; exit $$return_code;
 
+.PHONY: usage install run start stop ready logs test-ci build-local build-docker clean

lambda-debug-mode/java/base-enable-lambda-debug-mode/README.md

@@ -8,31 +8,30 @@ The demo deploys a Lambda function with a one-second timeout, which is automatic
 * LocalStack
 * Docker
 * `make`
-* `gradle`
-* `java17`
 * [`awslocal`](https://github.com/localstack/awscli-local)
+* `java17` and `gradle` (optional for local build)
 
 ## Installing
 
-To build the Lambda funcion archive:
-```
-make build-zip
+To build the Lambda function archive:
+
+```sh
+make install
 ```
 
 ## Starting Up
 
 Make sure that LocalStack is started with the following configuration:
-```
-LAMBDA_DEBUG_MODE=1 \
-LAMBDA_DEBUG_MODE_CONFIG_PATH=path/to/lambda_debug_mode_config.yaml \
-localstack start
-```
 
-Lambda Debug Mode is enabled through the config option `LAMBDA_DEBUG_MODE=1`.
-
-The config option `LAMBDA_DEBUG_MODE_CONFIG_PATH` should point to the provided `yaml` config file for Lambda Debug Mode `lambda_debug_mode_config.yaml`.
-The config file contains instructions for Lambda Debug Mode to debug the Lambda function `arn:aws:lambda:us-east-1:000000000000:function:function-one` on port `5050`.
+```sh
+LOCALSTACK_LAMBDA_DEBUG_MODE=1 \
+LOCALSTACK_LAMBDA_DEBUG_MODE_CONFIG_PATH=/tmp/lambda_debug_mode_config.yaml \
+localstack start --volume $PWD/lambda_debug_mode_config.yaml:/tmp/lambda_debug_mode_config.yaml
+```
 
+* `LOCALSTACK_LAMBDA_DEBUG_MODE=1` enables the Lambda debug mode
+* `LOCALSTACK_LAMBDA_DEBUG_MODE_CONFIG_PATH=/tmp/lambda_debug_mode_config.yaml` points to the config file for Lambda debug mode allowing for advanced configuration. It maps the Lambda function `arn:aws:lambda:us-east-1:000000000000:function:function-one` to port `5050`.
+* `--volume $PWD/lambda_debug_mode_config.yaml:/tmp/lambda_debug_mode_config.yaml` maps the Lambda debug configuration from the host into the LocalStack Docker container for hot-reloading.
 
 ## Running the Sample
 
@@ -41,7 +40,7 @@ The project requires you to configure your IDE or editor of choice to debug remo
 
 The following command used to deploy and invoke the Lambda locally:
 
-```
+```sh
 make run
 ```
 
@@ -53,4 +52,3 @@ LocalStack will automatically waive the set one second timeout for the Lambda fu
 ## License
 
 The code in this sample is available under the Apache 2.0 license.
-

…base-enable-lambda-debug-mode/.gitignore …mbda-debug-mode/java-function/.gitignorelambda-debug-mode/java/base-enable-lambda-debug-mode/java-lambda-function/base-enable-lambda-debug-mode/.gitignore renamed to lambda-debug-mode/java/base-enable-lambda-debug-mode/java-function/.gitignore lambda-debug-mode/java/base-enable-lambda-debug-mode/java-lambda-function/base-enable-lambda-debug-mode/.gitignore renamed to lambda-debug-mode/java/base-enable-lambda-debug-mode/java-function/.gitignore

@@ -1,6 +1,7 @@
-#Wed Sep 04 15:04:29 CEST 2024
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.8-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.11-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

…se-enable-lambda-debug-mode/build.gradle …da-debug-mode/java-function/build.gradlelambda-debug-mode/java/base-enable-lambda-debug-mode/java-lambda-function/base-enable-lambda-debug-mode/build.gradle renamed to lambda-debug-mode/java/base-enable-lambda-debug-mode/java-function/build.gradle lambda-debug-mode/java/base-enable-lambda-debug-mode/java-lambda-function/base-enable-lambda-debug-mode/build.gradle renamed to lambda-debug-mode/java/base-enable-lambda-debug-mode/java-function/build.gradle

@@ -15,6 +15,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 
 ##############################################################################
 #
@@ -55,7 +57,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -80,13 +82,12 @@ do
     esac
 done
 
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
-
-APP_NAME="Gradle"
+# This is normally unused
+# shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
-
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
+' "$PWD" ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
@@ -133,22 +134,29 @@ location of your Java installation."
     fi
 else
     JAVACMD=java
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 
 Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
+    fi
 fi
 
 # Increase the maximum file descriptors if we can.
 if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
     case $MAX_FD in  #(
       '' | soft) :;; #(
       *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
@@ -193,18 +201,28 @@ if "$cygwin" || "$msys" ; then
     done
 fi
 
-# Collect all arguments for the java command;
-#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
-#     shell script including quotes and variable substitutions, so put them in
-#     double quotes to make sure that they get re-expanded; and
-#   * put everything else in single quotes, so that it's not re-expanded.
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \
         -classpath "$CLASSPATH" \
         org.gradle.wrapper.GradleWrapperMain \
         "$@"
 
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
 # Use "xargs" to parse quoted args.
 #
 # With -n1 it outputs one arg per line, with the quotes and backslashes removed.