Best way to handle javaexec configuration?

Old Forum
1

Here is code to start a java process. The problem with this code, is it is executed at configuration time. So the warnings about parameters not being setup shouldn’t apply unless the tasks in question is being executed. Basically, we want the warnings to apply only when the task is actually executed and the task execution to be stopped. Right now if I run “gradlew startNode” it will attempt to run the process even though it’s not configured properly. Thoughts/suggestions?

task startNode(type: JavaExec) {
    group = CLUSTER_GROUP
    description = "Start Analytic Engine."
    main = AEMain
    args('start')
    classpath = sourceSets.main.runtimeClasspath
    def clusterSystemProperties = ["optimize.home.path": '',
            "base.config.path": '',
            "electric.mappings": '',
            "file.encoding": "UTF-8",
            "com.sun.management.jmxremote": true,
            "opt.terracotta": project.properties["opt.terracotta"]]
    def nodeNumber = project.properties['node']
    if (nodeNumber < 1) {
        println('please specify node number like 1, 2..etc as a value -Pnode=')
        return
    }
    def clusterHome = project.properties['cluster.home']
    if (!clusterHome) {
        println('please specify cluster home directory path as a value to -Pcluster.home. This value can be located in your clusterSample.properties')
        return
    }
    def clusterDebugPort = project.properties['debugPort'] ?: 5005 + nodeNumber
    def clusterRunAEJvmDebugArgs = ["-Xdebug", "-Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=$clusterDebugPort"]
    def clusterRunAEJvmArguments = ["-Xss256k", "-Xms400m", "-Xmx800m", "-XX:+UseParNewGC"] + clusterRunAEJvmDebugArgs
    def optimizeHomePath = clusterHome + "/AE-NODE-" + nodeNumber
    def baseConfigPath = optimizeHomePath + "/conf"
    def electricMapPath = baseConfigPath + "/glue/maps"
    clusterSystemProperties['optimize.home.path'] = optimizeHomePath
    clusterSystemProperties['base.config.path'] = baseConfigPath
    clusterSystemProperties['electric.mappings'] = electricMapPath
    systemProperties = clusterSystemProperties
    if (project.properties['profilingEnabled'] == "true") {
        clusterRunAEJvmArguments << "-agentlib:yjpagent"
    }
      jvmArgs(clusterRunAEJvmArguments)
}
2

you should move your checks into a doFirst closure and instead of “return” you should throw an exception (e.g. GradleException) with a meaningful message.

best regards, René

3

thanks. This does work, although I have to put in some null protection in the configuration closure like so:

def nodeNumber = project.properties['node'] ?: 1
 def clusterHome = project.properties['cluster.home'] ?: ""

Here is the code:

task startNode(type: JavaExec) {

group = CLUSTER_GROUP

description = “Start Analytic Engine.”

main = AEMain

args(‘start’)

classpath = sourceSets.main.runtimeClasspath

def clusterSystemProperties = [“optimize.home.path”: ‘’,

“base.config.path”: ‘’,

“electric.mappings”: ‘’,

“file.encoding”: “UTF-8”,

“com.sun.management.jmxremote”: true,

“opt.terracotta”: project.properties[“opt.terracotta”]]

def nodeNumber = project.properties[‘node’] ?: 1

def clusterHome = project.properties[‘cluster.home’] ?: “”

def clusterDebugPort = project.properties[‘debugPort’] ?: 5005 + nodeNumber

def clusterRunAEJvmDebugArgs = ["-Xdebug", “-Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=$clusterDebugPort”]

def clusterRunAEJvmArguments = ["-Xss256k", “-Xms400m”, “-Xmx800m”, “-XX:+UseParNewGC”] + clusterRunAEJvmDebugArgs

def optimizeHomePath = clusterHome + “/AE-NODE-” + nodeNumber

def baseConfigPath = optimizeHomePath + “/conf”

def electricMapPath = baseConfigPath + “/glue/maps”

clusterSystemProperties[‘optimize.home.path’] = optimizeHomePath

clusterSystemProperties[‘base.config.path’] = baseConfigPath

clusterSystemProperties[‘electric.mappings’] = electricMapPath

systemProperties = clusterSystemProperties

if (project.properties[‘profilingEnabled’] == “true”) {

clusterRunAEJvmArguments << “-agentlib:yjpagent”

}

jvmArgs(clusterRunAEJvmArguments) }

startNode.doFirst{

def nodeNumber = project.properties[‘node’]

if (nodeNumber < 1) {

throw new Exception(‘please specify node number like 1, 2…etc as a value -Pnode=’)

}

def clusterHome = project.properties[‘cluster.home’]

if (!clusterHome) {

throw new Exception(‘please specify cluster home directory path as a value to -Pcluster.home. This value can be located in your clusterSample.properties’)

} }