github.com/apache/beam/sdks/v2@v2.48.2/java/transform-service/controller-container/boot.go (about)

     1  // Licensed to the Apache Software Foundation (ASF) under one or more
     2  // contributor license agreements.  See the NOTICE file distributed with
     3  // this work for additional information regarding copyright ownership.
     4  // The ASF licenses this file to You under the Apache License, Version 2.0
     5  // (the "License"); you may not use this file except in compliance with
     6  // the License.  You may obtain a copy of the License at
     7  //
     8  //    http://www.apache.org/licenses/LICENSE-2.0
     9  //
    10  // Unless required by applicable law or agreed to in writing, software
    11  // distributed under the License is distributed on an "AS IS" BASIS,
    12  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  // See the License for the specific language governing permissions and
    14  // limitations under the License.
    15  
    16  // Boot code for the transform service controller.
    17  // Contract:
    18  //   https://github.com/apache/beam/blob/master/model/job-management/src/main/proto/org/apache/beam/model/job_management/v1/beam_expansion_api.proto
    19  //   https://github.com/apache/beam/blob/master/model/job-management/src/main/proto/org/apache/beam/model/job_management/v1/beam_artifact_api.proto
    20  package main
    21  
    22  import (
    23  	// 	"context"
    24  	"flag"
    25  	"fmt"
    26  	"io/ioutil"
    27  	"log"
    28  	"os"
    29  	"path/filepath"
    30  	"strconv"
    31  	"strings"
    32  
    33  	"github.com/apache/beam/sdks/v2/go/pkg/beam/util/execx"
    34  )
    35  
    36  // Args:
    37  //   - Transform service port
    38  //   - Config file path. Config file contains:
    39  //     - A list of expansion services
    40  var (
    41  	port        = flag.Int("port", 0, "Port for the expansion service (required)")
    42  	config_file = flag.String("config_file", "", "Transform service config YAML file. (required)")
    43  )
    44  
    45  const entrypoint = "org.apache.beam.sdk.transformservice.Controller"
    46  
    47  func main() {
    48  	flag.Parse()
    49  
    50  	if *port == 0 {
    51  		log.Fatalf("The flag 'port' was not specified")
    52  	}
    53  
    54  	if *config_file == "" {
    55  		log.Fatalf("The flag 'config_file' was not specified")
    56  	}
    57  
    58  	log.Printf("Starting the transform service controller container")
    59  
    60  	// Determine all jar files from the 'jars' to be used for the CLASSPATH.
    61  	files, _ := ioutil.ReadDir("jars")
    62  	cp := []string{}
    63  	path, _ := os.Getwd()
    64  	for _, file := range files {
    65  		cp = append(cp, filepath.Join(path, "jars", file.Name()))
    66  	}
    67  
    68  	args := []string{
    69  		// Seting max RAM percentage to a high value since we are running a single JVM within the container.
    70  		"-XX:MaxRAMPercentage=80.0",
    71  		// Keep following JVM options in sync with other Java containers released with Beam.
    72  		"-XX:+UseParallelGC",
    73  		"-XX:+AlwaysActAsServerClassMachine",
    74  		"-XX:-OmitStackTraceInFastThrow",
    75  		"-cp", strings.Join(cp, ":"),
    76  	}
    77  
    78  	args = append(args, entrypoint)
    79  
    80  	if *port != 0 {
    81  		args = append(args, fmt.Sprintf("--port=%s", strconv.Itoa(*port)))
    82  	}
    83  	if *config_file != "" {
    84  		args = append(args, fmt.Sprintf("--transformServiceConfigFile=%s", *config_file))
    85  	}
    86  
    87  	log.Printf("Executing: java %v", strings.Join(args, " "))
    88  	log.Fatalf("Java exited: %v", execx.Execute("java", args...))
    89  }