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How to use findSocketFile method of sun.tools.attach.BsdVirtualMachine class

Best Powermock code snippet using sun.tools.attach.BsdVirtualMachine.findSocketFile

Source:BsdVirtualMachine.java

...61        }62        // Find the socket file. If not found then we attempt to start the63        // attach mechanism in the target VM by sending it a QUIT signal.64        // Then we attempt to find the socket file again.65        path = findSocketFile(pid);66        if (path == null) {67            File f = new File(tmpdir, ".attach_pid" + pid);68            createAttachFile(f.getPath());69            try {70                sendQuitTo(pid);71                // give the target VM time to start the attach mechanism72                int i = 0;73                long delay = 200;74                int retries = (int)(attachTimeout() / delay);75                do {76                    try {77                        Thread.sleep(delay);78                    } catch (InterruptedException x) { }79                    path = findSocketFile(pid);80                    i++;81                } while (i <= retries && path == null);82                if (path == null) {83                    throw new AttachNotSupportedException(84                        "Unable to open socket file: target process not responding " +85                        "or HotSpot VM not loaded");86                }87            } finally {88                f.delete();89            }90        }91        // Check that the file owner/permission to avoid attaching to92        // bogus process93        checkPermissions(path);94        // Check that we can connect to the process95        // - this ensures we throw the permission denied error now rather than96        // later when we attempt to enqueue a command.97        int s = socket();98        try {99            connect(s, path);100        } finally {101            close(s);102        }103    }104    /**105     * Detach from the target VM106     */107    public void detach() throws IOException {108        synchronized (this) {109            if (this.path != null) {110                this.path = null;111            }112        }113    }114    // protocol version115    private final static String PROTOCOL_VERSION = "1";116    // known errors117    private final static int ATTACH_ERROR_BADVERSION = 101;118    /**119     * Execute the given command in the target VM.120     */121    InputStream execute(String cmd, Object ... args) throws AgentLoadException, IOException {122        assert args.length <= 3;                // includes null123        // did we detach?124        String p;125        synchronized (this) {126            if (this.path == null) {127                throw new IOException("Detached from target VM");128            }129            p = this.path;130        }131        // create UNIX socket132        int s = socket();133        // connect to target VM134        try {135            connect(s, p);136        } catch (IOException x) {137            close(s);138            throw x;139        }140        IOException ioe = null;141        // connected - write request142        // <ver> <cmd> <args...>143        try {144            writeString(s, PROTOCOL_VERSION);145            writeString(s, cmd);146            for (int i=0; i<3; i++) {147                if (i < args.length && args[i] != null) {148                    writeString(s, (String)args[i]);149                } else {150                    writeString(s, "");151                }152            }153        } catch (IOException x) {154            ioe = x;155        }156        // Create an input stream to read reply157        SocketInputStream sis = new SocketInputStream(s);158        // Read the command completion status159        int completionStatus;160        try {161            completionStatus = readInt(sis);162        } catch (IOException x) {163            sis.close();164            if (ioe != null) {165                throw ioe;166            } else {167                throw x;168            }169        }170        if (completionStatus != 0) {171            sis.close();172            // In the event of a protocol mismatch then the target VM173            // returns a known error so that we can throw a reasonable174            // error.175            if (completionStatus == ATTACH_ERROR_BADVERSION) {176                throw new IOException("Protocol mismatch with target VM");177            }178            // Special-case the "load" command so that the right exception is179            // thrown.180            if (cmd.equals("load")) {181                throw new AgentLoadException("Failed to load agent library");182            } else {183                throw new IOException("Command failed in target VM");184            }185        }186        // Return the input stream so that the command output can be read187        return sis;188    }189    /*190     * InputStream for the socket connection to get target VM191     */192    private class SocketInputStream extends InputStream {193        int s;194        public SocketInputStream(int s) {195            this.s = s;196        }197        public synchronized int read() throws IOException {198            byte b[] = new byte[1];199            int n = this.read(b, 0, 1);200            if (n == 1) {201                return b[0] & 0xff;202            } else {203                return -1;204            }205        }206        public synchronized int read(byte[] bs, int off, int len) throws IOException {207            if ((off < 0) || (off > bs.length) || (len < 0) ||208                ((off + len) > bs.length) || ((off + len) < 0)) {209                throw new IndexOutOfBoundsException();210            } else if (len == 0)211                return 0;212            return BsdVirtualMachine.read(s, bs, off, len);213        }214        public void close() throws IOException {215            BsdVirtualMachine.close(s);216        }217    }218    // Return the socket file for the given process.219    // Checks temp directory for .java_pid<pid>.220    private String findSocketFile(int pid) {221        String fn = ".java_pid" + pid;222        File f = new File(tmpdir, fn);223        return f.exists() ? f.getPath() : null;224    }225    /*226     * Write/sends the given to the target VM. String is transmitted in227     * UTF-8 encoding.228     */229    private void writeString(int fd, String s) throws IOException {230        if (s.length() > 0) {231            byte b[];232            try {233                b = s.getBytes("UTF-8");234            } catch (java.io.UnsupportedEncodingException x) {...

findSocketFile

Using AI Code Generation

1import sun.tools.attach.BsdVirtualMachine;2import java.io.IOException;3import java.lang.management.ManagementFactory;4import java.util.ArrayList;5import java.util.List;6public class FindSocketFile {7    public static void main(String[] args) throws IOException {8        String pid = ManagementFactory.getRuntimeMXBean().getName().split("@")[0];9        System.out.println(BsdVirtualMachine.findSocketFile(pid));10    }11}

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