[Prism] Enable Java validatesRunner tests on Prism (#31075)

* Create :runners:prism:java:validatesRunner task

* Configure minimal needed to run portability tests

* Condence path resolutions in gradle configuration

runners/portability/java/build.gradle

@@ -54,14 +54,17 @@ dependencies {
   validatesRunner project(path: project.path, configuration: "testRuntimeMigration")
 }
 
+// Set using -PjobEndpoint=, for example: -PjobEndpoint=localhost:8073
+def jobEndpointPropertyName = "jobEndpoint"
+
 project.evaluationDependsOn(":sdks:java:core")
 project.evaluationDependsOn(":sdks:python")
 project.evaluationDependsOn(":runners:core-java")
 
 ext.pythonSdkDir = project.findProject(":sdks:python").getProjectDir().getAbsoluteFile().toString()
 
 // If this is set via -P then we assume it is already running and will not start it
-def needsLocalJobService = !project.hasProperty("localJobServicePortFile")
+def needsLocalJobService = !project.hasProperty("localJobServicePortFile") && !project.hasProperty(jobEndpointPropertyName)
 
 ext.localJobServicePortFile = project.hasProperty("localJobServicePortFile") ? project.property("localJobServicePortFile") : "${project.buildDir}/local_job_service_port"
 
@@ -139,11 +142,15 @@ def createUlrValidatesRunnerTask = { name, environmentType, dockerImageTask = ""
   Task vrTask = tasks.create(name: name, type: Test, group: "Verification") {
     description "PortableRunner Java docker ValidatesRunner suite"
     classpath = configurations.validatesRunner
+    var jobEndpointOption = "--localJobServicePortFile=$localJobServicePortFile"
+    if (project.hasProperty(jobEndpointPropertyName)) {
+      jobEndpointOption = "--$jobEndpointPropertyName=${project.findProperty(jobEndpointPropertyName)}"
+    }
     systemProperty "beamTestPipelineOptions", JsonOutput.toJson([
         "--runner=TestUniversalRunner",
         "--experiments=beam_fn_api",
         "--defaultEnvironmentType=${environmentType}",
-        "--localJobServicePortFile=${localJobServicePortFile}"
+        jobEndpointOption
     ])
     testClassesDirs = files(project(":sdks:java:core").sourceSets.test.output.classesDirs)
     useJUnit {

runners/prism/build.gradle

@@ -0,0 +1,65 @@
+/*
+ * 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.
+ */
+
+plugins { id 'org.apache.beam.module' }
+applyGoNature()
+
+description = "Apache Beam :: Runners :: Prism"
+ext.summary = "Tasks related to executing the Prism Runner"
+
+// jobPort Property optionally configures the Prism job_port flag.
+def jobPort = findProperty("jobPort")
+
+// jobPortFlag is Prism service's job management service port flag name.
+def jobPortFlag = "job_port"
+
+// buildTarget is the go build output target path for the Prism service.
+def buildTarget = layout.buildDirectory.get().file("tmp/prism")
+
+// modDir is the path containing the go.mod file.
+def modDir = project.rootDir.toPath().resolve("sdks")
+
+// prismDir is the directory containing the prism executable.
+def prismDir = modDir.resolve("go/cmd/prism")
+
+// Overrides the gradle build task to build the prism executable.
+def buildTask = tasks.named("build") {
+    // goPrepare is a task registered in applyGoNature.
+    dependsOn("goPrepare")
+    doLast {
+        exec {
+            workingDir = modDir
+            executable = 'sh'
+            args = ["-c", "${project.ext.goCmd} build -o $buildTarget $prismDir"]
+        }
+    }
+}
+
+tasks.register("runServer", Exec) {
+    dependsOn(buildTask)
+    group = "application"
+    description = "Run the Prism server"
+
+    List<String> command = new ArrayList<>()
+    command.add(buildTarget.asFile.path)
+    if (jobPort != null) {
+        command.add("-$jobPortFlag=$jobPort" as String)
+    }
+
+    commandLine = command
+}

settings.gradle.kts

@@ -148,6 +148,7 @@ include(":runners:java-job-service")
 include(":runners:jet")
 include(":runners:local-java")
 include(":runners:portability:java")
+include(":runners:prism")
 include(":runners:spark:3")
 include(":runners:spark:3:job-server")
 include(":runners:spark:3:job-server:container")