Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

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}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.