maven scala plugin 使用教程笔记之jvmArgs配置,自定义properties 在jvmArgs -D参数中使用

jvmArgs是什么

举个例子:

$JAVA_ARGS.=“-Dresin.home=$SERVER_ROOT-server
    
    -Xms2048M-Xmx2048M-Xmn512M-XX:PermSize=256M
    
    -XX:MaxPermSize=256M-XX:+UseConcMarkSweepGC
    
    -XX:MaxTenuringThreshold=7-XX:GCTimeRatio=19
    
    -Xnoclassgc-Xloggc:log/gc.log-XX:+PrintGCDetails
    
    -XX:+PrintGCTimeStamps-XX:+UseCMSCompactAtFullCollection
    
    -XX:CMSFullGCsBeforeCompaction=0”

这是JVM参数调优时候的一些配置

java的System.getProperty

java的System.getProperty()方法默认可以获取的值:

| Key | Value|

| Java.version | Java 运行时环境版本|

| java.vendor | Java 运行时环境供应商 |

|java.vendor.url|Java 供应商的 URL|

|java.home|Java 安装目录|

|java.vm.specification.version|Java 虚拟机规范版本|

|java.vm.specification.vendor|Java 虚拟机规范供应商|

|java.vm.specification.name|Java 虚拟机规范名称|

|java.vm.version|Java 虚拟机实现版本|

|java.vm.vendor|Java 虚拟机实现供应商|

|java.vm.name|Java 虚拟机实现名称|

|java.specification.version|Java 运行时环境规范版本|

|java.specification.vendor|Java 运行时环境规范供应商|

|java.specification.name|Java 运行时环境规范名称|

|java.class.version|Java 类格式版本号|

|java.class.path|Java 类路径|

|java.library.path|加载库时搜索的路径列表|

|java.io.tmpdir|默认的临时文件路径|

|java.compiler|要使用的 JIT 编译器的名称|

|java.ext.dirs|一个或多个扩展目录的路径|

|os.name|操作系统的名称|

|os.arch|操作系统的架构|

|os.version|操作系统的版本|

|file.separator|文件分隔符（在 UNIX 系统中是“/”）|

|path.separator|路径分隔符（在 UNIX 系统中是“:”）|

|line.separator|行分隔符（在 UNIX 系统中是“/n”）|

|user.name|用户的账户名称|

|user.home|用户的主目录|

|user.dir|用户的当前工作目录|

自定义properties 在jvmArgs -D参数中使用

public class AutoKeyConfig {
   
    public static final String AUTOKEY_PORT = "sword.autokey.port";

    public static final int PORT_DEFAULT = 8204;
}

实现代码:

String portStr = SwordConfigLoader.getProperty(AutoKeyConfig.AUTOKEY_PORT);
int port = portStr != null ? Integer.parseInt(portStr) : AutoKeyConfig.PORT_DEFAULT;

maven build 生命周期配置jvmArgs

<build>
    <sourceDirectory>src/main/scala</sourceDirectory>
    <plugins>
        <plugin>
            <groupId>org.scala-tools</groupId>
            <artifactId>maven-scala-plugin</artifactId>
            <configuration>
                <launchers>
                    <launcher>
                        <id>pdata</id>
                        <mainClass>com.pdata.PDataApplication</mainClass>
                        <!-- args are optional -->
                        <!--<args>-->
                        <!--<arg>arg1</arg>-->
                        <!--</args>-->
                        <!-- jvmArgs are optional -->
                        <jvmArgs>
                            <jvmArg>-Xmx1024m</jvmArg>
                            <jvmArg>-Dsword.autokey.port=9202</jvmArg>
                        </jvmArgs>
                    </launcher>
                    <!-- you could define other launcher -->
                </launchers>
            </configuration>
            <executions>
                <execution>
                    <id>compile-and-test-compile</id>
                    <goals>
                        <goal>compile</goal>
                        <goal>testCompile</goal>
                        <goal>run</goal>
                    </goals>
                </execution>
                <execution>
                    <id>doc</id>
                    <phase>install</phase>
                    <goals>
                        <goal>doc</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <executions>
                <execution>
                    <goals>
                        <goal>repackage</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-dependency-plugin</artifactId>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>copy-dependencies</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <includeScope>system</includeScope>
                <!--<outputDirectory>${project.build.directory}/${project.build.finalName}/lib</outputDirectory>-->
            </configuration>
        </plugin>
    </plugins>
</build>

这样,就可以直接使用如下命令动态注入sword.autokey.prot的值, 启动应用:

mvn scala:run -Dlauncher=pdata