Java Origin类代码示例

import com.sun.management.VMOption.Origin; //导入依赖的package包/类
Flag(String name, Object value, boolean writeable,
     boolean external, Origin origin) {
    this.name = name;
    this.value = value == null ? "" : value ;
    this.origin = origin;
    this.writeable = writeable;
    this.external = external;
}
 

import com.sun.management.VMOption.Origin; //导入依赖的package包/类
private static void checkOrigin(String option, Origin origin) throws Exception
{
    Origin o = mbean.getVMOption(option).getOrigin();
    if (!o.equals(origin)) {
        throw new Exception("Option '" + option + "' should have origin '" + origin + "' but had '" + o + "'");
    }
    System.out.println("Option '" + option + "' verified origin = '" + origin + "'");
}
 

import com.sun.management.VMOption.Origin; //导入依赖的package包/类
public static Origin getOrigin(CompositeData cd) {
    String o = getString(cd, ORIGIN);
    return Enum.valueOf(Origin.class, o);
}
 

import com.sun.management.VMOption.Origin; //导入依赖的package包/类
public static void main(String[] args) throws Exception {
    mbean =
        ManagementFactory.getPlatformMXBean(HotSpotDiagnosticMXBean.class);

    VMOption option = findPrintGCDetailsOption();
    if (!option.getValue().equalsIgnoreCase(EXPECTED_VALUE)) {
        throw new RuntimeException("Unexpected value: " +
            option.getValue() + " expected: " + EXPECTED_VALUE);
    }
    if (option.getOrigin() != Origin.VM_CREATION) {
        throw new RuntimeException("Unexpected origin: " +
            option.getOrigin() + " expected: VM_CREATION");
    }
    if (!option.isWriteable()) {
        throw new RuntimeException("Expected " + PRINT_GC_DETAILS +
            " to be writeable");
    }

    // set VM option to a new value
    mbean.setVMOption(PRINT_GC_DETAILS, NEW_VALUE);

    option = findPrintGCDetailsOption();
    if (!option.getValue().equalsIgnoreCase(NEW_VALUE)) {
        throw new RuntimeException("Unexpected value: " +
            option.getValue() + " expected: " + NEW_VALUE);
    }
    if (option.getOrigin() != Origin.MANAGEMENT) {
        throw new RuntimeException("Unexpected origin: " +
            option.getOrigin() + " expected: MANAGEMENT");
    }
    VMOption o = mbean.getVMOption(PRINT_GC_DETAILS);
    if (!option.getValue().equals(o.getValue())) {
        throw new RuntimeException("Unmatched value: " +
            option.getValue() + " expected: " + o.getValue());
    }
    if (!option.getValue().equals(o.getValue())) {
        throw new RuntimeException("Unmatched value: " +
            option.getValue() + " expected: " + o.getValue());
    }
    if (option.getOrigin() != o.getOrigin()) {
        throw new RuntimeException("Unmatched origin: " +
            option.getOrigin() + " expected: " + o.getOrigin());
    }
    if (option.isWriteable() != o.isWriteable()) {
        throw new RuntimeException("Unmatched writeable: " +
            option.isWriteable() + " expected: " + o.isWriteable());
    }

    // check if ManagementServer is not writeable
    List<VMOption> options = mbean.getDiagnosticOptions();
    VMOption mgmtServerOption = null;
    for (VMOption o1 : options) {
        if (o1.getName().equals(MANAGEMENT_SERVER)) {
             mgmtServerOption = o1;
             break;
        }
    }
    if (mgmtServerOption != null) {
        throw new RuntimeException(MANAGEMENT_SERVER +
            " is not expected to be writeable");
    }
    mgmtServerOption = mbean.getVMOption(MANAGEMENT_SERVER);
    if (mgmtServerOption == null) {
        throw new RuntimeException(MANAGEMENT_SERVER +
            " should exist.");
    }
    if (mgmtServerOption.getOrigin() != Origin.DEFAULT) {
        throw new RuntimeException(MANAGEMENT_SERVER +
            " should have the default value.");
    }
    if (mgmtServerOption.isWriteable()) {
        throw new RuntimeException(MANAGEMENT_SERVER +
            " is not expected to be writeable");
    }
}
 

import com.sun.management.VMOption.Origin; //导入依赖的package包/类
public static void main(String... args) throws Exception {
    if (args.length == 0) {
        // start a process that has options set in a number of different ways

        File flagsFile = File.createTempFile("CheckOriginFlags", null);
        try (PrintWriter pw =
               new PrintWriter(new FileWriter(flagsFile))) {
            pw.println("+PrintSafepointStatistics");
        }

        ProcessBuilder pb = ProcessTools.
            createJavaProcessBuilder(
                "--add-exports", "jdk.attach/sun.tools.attach=ALL-UNNAMED",
                "-XX:+UseConcMarkSweepGC",  // this will cause MaxNewSize to be FLAG_SET_ERGO
                "-XX:+UseCodeAging",
                "-XX:+UseCerealGC",         // Should be ignored.
                "-XX:Flags=" + flagsFile.getAbsolutePath(),
                "-Djdk.attach.allowAttachSelf",
                "-cp", System.getProperty("test.class.path"),
                "CheckOrigin",
                "-runtests");

        Map<String, String> env = pb.environment();
        // "UseCMSGC" should be ignored.
        env.put("_JAVA_OPTIONS", "-XX:+CheckJNICalls -XX:+UseCMSGC");
        // "UseGOneGC" should be ignored.
        env.put("JAVA_TOOL_OPTIONS", "-XX:+IgnoreUnrecognizedVMOptions "
            + "-XX:+PrintVMOptions -XX:+UseGOneGC");

        pb.redirectOutput(ProcessBuilder.Redirect.INHERIT);
        pb.redirectError(ProcessBuilder.Redirect.INHERIT);
        Process p = pb.start();
        int exit = p.waitFor();
        System.out.println("sub process exit == " + exit);
        if (exit != 0) {
            throw new Exception("Unexpected exit code from subprocess == " + exit);
        }
    } else {
        mbean =
            ManagementFactory.getPlatformMXBean(HotSpotDiagnosticMXBean.class);

        // set a few more options
        mbean.setVMOption("HeapDumpOnOutOfMemoryError", "true");
        setOptionUsingAttach("HeapDumpPath", "/a/sample/path");

        // check the origin field for all the options we set

        // Not set, so should be default
        checkOrigin("ManagementServer", Origin.DEFAULT);
        // Set on the command line
        checkOrigin("UseCodeAging", Origin.VM_CREATION);
        // Set in _JAVA_OPTIONS
        checkOrigin("CheckJNICalls", Origin.ENVIRON_VAR);
        // Set in JAVA_TOOL_OPTIONS
        checkOrigin("IgnoreUnrecognizedVMOptions", Origin.ENVIRON_VAR);
        checkOrigin("PrintVMOptions", Origin.ENVIRON_VAR);
        // Set in -XX:Flags file
        checkOrigin("PrintSafepointStatistics", Origin.CONFIG_FILE);
        // Set through j.l.m
        checkOrigin("HeapDumpOnOutOfMemoryError", Origin.MANAGEMENT);
        // Should be set by the VM, when we set UseConcMarkSweepGC
        checkOrigin("MaxNewSize", Origin.ERGONOMIC);
        // Set using attach
        checkOrigin("HeapDumpPath", Origin.ATTACH_ON_DEMAND);
    }
}
 

import com.sun.management.VMOption.Origin; //导入依赖的package包/类
public static void main(String[] args) throws Exception {
    mbean =
        ManagementFactory.getPlatformMXBean(HotSpotDiagnosticMXBean.class);

    VMOption option = findHeapDumpOnOomOption();
    if (!option.getValue().equalsIgnoreCase(EXPECTED_VALUE)) {
        throw new RuntimeException("Unexpected value: " +
            option.getValue() + " expected: " + EXPECTED_VALUE);
    }
    if (option.getOrigin() != Origin.VM_CREATION) {
        throw new RuntimeException("Unexpected origin: " +
            option.getOrigin() + " expected: VM_CREATION");
    }
    if (!option.isWriteable()) {
        throw new RuntimeException("Expected " + HEAP_DUMP_ON_OOM +
            " to be writeable");
    }

    // set VM option to a new value
    mbean.setVMOption(HEAP_DUMP_ON_OOM, NEW_VALUE);

    option = findHeapDumpOnOomOption();
    if (!option.getValue().equalsIgnoreCase(NEW_VALUE)) {
        throw new RuntimeException("Unexpected value: " +
            option.getValue() + " expected: " + NEW_VALUE);
    }
    if (option.getOrigin() != Origin.MANAGEMENT) {
        throw new RuntimeException("Unexpected origin: " +
            option.getOrigin() + " expected: MANAGEMENT");
    }
    VMOption o = mbean.getVMOption(HEAP_DUMP_ON_OOM);
    if (!option.getValue().equals(o.getValue())) {
        throw new RuntimeException("Unmatched value: " +
            option.getValue() + " expected: " + o.getValue());
    }
    if (!option.getValue().equals(o.getValue())) {
        throw new RuntimeException("Unmatched value: " +
            option.getValue() + " expected: " + o.getValue());
    }
    if (option.getOrigin() != o.getOrigin()) {
        throw new RuntimeException("Unmatched origin: " +
            option.getOrigin() + " expected: " + o.getOrigin());
    }
    if (option.isWriteable() != o.isWriteable()) {
        throw new RuntimeException("Unmatched writeable: " +
            option.isWriteable() + " expected: " + o.isWriteable());
    }

    // check if ManagementServer is not writeable
    List<VMOption> options = mbean.getDiagnosticOptions();
    VMOption mgmtServerOption = null;
    for (VMOption o1 : options) {
        if (o1.getName().equals(MANAGEMENT_SERVER)) {
             mgmtServerOption = o1;
             break;
        }
    }
    if (mgmtServerOption != null) {
        throw new RuntimeException(MANAGEMENT_SERVER +
            " is not expected to be writeable");
    }
    mgmtServerOption = mbean.getVMOption(MANAGEMENT_SERVER);
    if (mgmtServerOption == null) {
        throw new RuntimeException(MANAGEMENT_SERVER +
            " should exist.");
    }
    if (mgmtServerOption.getOrigin() != Origin.DEFAULT) {
        throw new RuntimeException(MANAGEMENT_SERVER +
            " should have the default value.");
    }
    if (mgmtServerOption.isWriteable()) {
        throw new RuntimeException(MANAGEMENT_SERVER +
            " is not expected to be writeable");
    }
}
 

import com.sun.management.VMOption.Origin; //导入依赖的package包/类
public static void main(String... args) throws Exception {
    if (args.length == 0) {
        // start a process that has options set in a number of different ways

        File flagsFile = File.createTempFile("CheckOriginFlags", null);
        try (PrintWriter pw =
               new PrintWriter(new FileWriter(flagsFile))) {
            pw.println("+PrintSafepointStatistics");
        }

        ProcessBuilder pb = ProcessTools.
            createJavaProcessBuilder(
                "-XaddExports:jdk.attach/sun.tools.attach=ALL-UNNAMED",
                "-XX:+UseConcMarkSweepGC",  // this will cause UseParNewGC to be FLAG_SET_ERGO
                "-XX:+UseCodeAging",
                "-XX:+UseCerealGC",         // Should be ignored.
                "-XX:Flags=" + flagsFile.getAbsolutePath(),
                "-cp", System.getProperty("test.class.path"),
                "CheckOrigin",
                "-runtests");

        Map<String, String> env = pb.environment();
        // "UseCMSGC" should be ignored.
        env.put("_JAVA_OPTIONS", "-XX:+CheckJNICalls -XX:+UseCMSGC");
        // "UseGOneGC" should be ignored.
        env.put("JAVA_TOOL_OPTIONS", "-XX:+IgnoreUnrecognizedVMOptions "
            + "-XX:+PrintVMOptions -XX:+UseGOneGC");

        pb.redirectOutput(ProcessBuilder.Redirect.INHERIT);
        pb.redirectError(ProcessBuilder.Redirect.INHERIT);
        Process p = pb.start();
        int exit = p.waitFor();
        System.out.println("sub process exit == " + exit);
        if (exit != 0) {
            throw new Exception("Unexpected exit code from subprocess == " + exit);
        }
    } else {
        mbean =
            ManagementFactory.getPlatformMXBean(HotSpotDiagnosticMXBean.class);

        // set a few more options
        mbean.setVMOption("HeapDumpOnOutOfMemoryError", "true");
        setOptionUsingAttach("HeapDumpPath", "/a/sample/path");

        // check the origin field for all the options we set

        // Not set, so should be default
        checkOrigin("ManagementServer", Origin.DEFAULT);
        // Set on the command line
        checkOrigin("UseCodeAging", Origin.VM_CREATION);
        // Set in _JAVA_OPTIONS
        checkOrigin("CheckJNICalls", Origin.ENVIRON_VAR);
        // Set in JAVA_TOOL_OPTIONS
        checkOrigin("IgnoreUnrecognizedVMOptions", Origin.ENVIRON_VAR);
        checkOrigin("PrintVMOptions", Origin.ENVIRON_VAR);
        // Set in -XX:Flags file
        checkOrigin("PrintSafepointStatistics", Origin.CONFIG_FILE);
        // Set through j.l.m
        checkOrigin("HeapDumpOnOutOfMemoryError", Origin.MANAGEMENT);
        // Should be set by the VM, when we set UseConcMarkSweepGC
        checkOrigin("UseParNewGC", Origin.ERGONOMIC);
        // Set using attach
        checkOrigin("HeapDumpPath", Origin.ATTACH_ON_DEMAND);
    }
}