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How to use provider method of com.sun.tools.attach.VirtualMachine class

Best Powermock code snippet using com.sun.tools.attach.VirtualMachine.provider

Source:VirtualMachine.java

...98 * @since 1.699 */100public abstract class VirtualMachine101{102   private final AttachProvider provider;103   private final String id;104   private volatile int hash;        // 0 => not computed105   /**106    * Initializes a new instance of this class.107    *108    * @param provider The attach provider creating this class.109    * @param id       The abstract identifier that identifies the Java virtual machine.110    */111   protected VirtualMachine(AttachProvider provider, String id)112   {113      this.provider = provider;114      this.id = id;115   }116   /**117    * Return a list of Java virtual machines.118    * <p/>119    * This method returns a list of Java {@link com.sun.tools.attach.VirtualMachineDescriptor}120    * elements.  The list is an aggregation of the virtual machine descriptor lists obtained by121    * invoking the {@link com.sun.tools.attach.spi.AttachProvider#listVirtualMachines122    * listVirtualMachines} method of all installed {@link com.sun.tools.attach.spi.AttachProvider123    * attach providers}.  If there are no Java virtual machines known to any provider then an empty124    * list is returned.125    *126    * @return The list of virtual machine descriptors.127    */128   public static List<VirtualMachineDescriptor> list()129   {130      List<VirtualMachineDescriptor> l = new ArrayList<VirtualMachineDescriptor>();131      List<AttachProvider> providers = AttachProvider.providers();132      for (AttachProvider provider : providers) {133         l.addAll(provider.listVirtualMachines());134      }135      return l;136   }137   /**138    * Attaches to a Java virtual machine.139    * <p/>140    * This method obtains the list of attach providers by invoking the141    * {@link com.sun.tools.attach.spi.AttachProvider#providers() AttachProvider.providers()} method.142    * It then iterates overs the list and invokes each provider's {@link143    * com.sun.tools.attach.spi.AttachProvider#attachVirtualMachine(java.lang.String)144    * attachVirtualMachine} method in turn. If a provider successfully145    * attaches then the iteration terminates, and the VirtualMachine created146    * by the provider that successfully attached is returned by this method.147    * If the <code>attachVirtualMachine</code> method of all providers throws148    * {@link com.sun.tools.attach.AttachNotSupportedException AttachNotSupportedException}149    * then this method also throws <code>AttachNotSupportedException</code>.150    * This means that <code>AttachNotSupportedException</code> is thrown when151    * the identifier provided to this method is invalid, or the identifier152    * corresponds to a Java virtual machine that does not exist, or none153    * of the providers can attach to it. This exception is also thrown if154    * {@link com.sun.tools.attach.spi.AttachProvider#providers()155    * AttachProvider.providers()} returns an empty list. </p>156    *157    * @param id The abstract identifier that identifies the Java virtual machine.158    * @return A VirtualMachine representing the target VM.159    * @throws SecurityException           If a security manager has been installed and it denies160    *                                     {@link com.sun.tools.attach.AttachPermission AttachPermission}161    *                                     <tt>("attachVirtualMachine")</tt>, or another permission162    *                                     required by the implementation.163    * @throws IOException                 If an I/O error occurs164    */165   public static VirtualMachine attach(String id) throws AttachNotSupportedException, IOException166   {167      List<AttachProvider> providers = AttachProvider.providers();168      AttachNotSupportedException lastExc = null;169      for (AttachProvider provider : providers) {170         try {171            return provider.attachVirtualMachine(id);172         }173         catch (AttachNotSupportedException x) {174            lastExc = x;175         }176      }177      throw lastExc;178   }179   /**180    * Attaches to a Java virtual machine.181    * <p/>182    * This method first invokes the {@link com.sun.tools.attach.VirtualMachineDescriptor#provider()183    * provider()} method of the given virtual machine descriptor to obtain the attach provider.184    * It then invokes the attach provider's {@link185    * com.sun.tools.attach.spi.AttachProvider#attachVirtualMachine(VirtualMachineDescriptor)186    * attachVirtualMachine} to attach to the target VM.187    *188    * @param   vmd The virtual machine descriptor.189    *190    * @return A VirtualMachine representing the target VM.191    *192    * @throws SecurityException193    *          If a security manager has been installed and it denies194    *          {@link com.sun.tools.attach.AttachPermission AttachPermission}195    *          <tt>("attachVirtualMachine")</tt>, or another permission196    *          required by the implementation.197    *198    * @throws AttachNotSupportedException199    *          If the attach provider's <code>attachVirtualmachine</code>200    *          throws <code>AttachNotSupportedException</code>.201    *202    * @throws IOException If an I/O error occurs203    *204    * @throws NullPointerException If <code>vmd</code> is <code>null</code>.205    */206   public static VirtualMachine attach(VirtualMachineDescriptor vmd)207      throws AttachNotSupportedException, IOException208   {209      return vmd.provider().attachVirtualMachine(vmd);210   }211   /**212    * Detach from the virtual machine.213    * <p/>214    * After detaching from the virtual machine, any further attempt to invoke215    * operations on that virtual machine will cause an {@link java.io.IOException216    * IOException} to be thrown. If an operation (such as {@link #loadAgent217    * loadAgent} for example) is in progress when this method is invoked then218    * the behaviour is implementation dependent. In other words, it is219    * implementation specific if the operation completes or throws <tt>IOException</tt>.220    * <p/>221    * If already detached from the virtual machine then invoking this method has no effect.222    *223    * @throws IOException If an I/O error occurs224    */225   public abstract void detach() throws IOException;226   /**227    * Returns the provider that created this virtual machine.228    */229   public final AttachProvider provider()230   {231      return provider;232   }233   /**234    * Returns the identifier for this Java virtual machine.235    */236   public final String id()237   {238      return id;239   }240   /**241    * Loads an agent library.242    * <p/>243    * A <a href="../../../../../../../../technotes/guides/jvmti/index.html">JVM244    * TI</a> client is called an <i>agent</i>. It is developed in a native language.245    * A JVM TI agent is deployed in a platform specific manner but it is typically the246    * platform equivalent of a dynamic library. This method causes the given agent247    * library to be loaded into the target VM (if not already loaded).248    * It then causes the target VM to invoke the <code>Agent_OnAttach</code> function249    * as specified in the250    * <a href="../../../../../../../../technotes/guides/jvmti/index.html"> JVM Tools251    * Interface</a> specification. Note that the <code>Agent_OnAttach</code>252    * function is invoked even if the agent library was loaded prior to invoking253    * this method.254    * <p/>255    * The agent library provided is the name of the agent library. It is interpreted256    * in the target virtual machine in an implementation-dependent manner. Typically an257    * implementation will expand the library name into an operating system specific file258    * name. For example, on UNIX systems, the name <tt>foo</tt> might be expanded to259    * <tt>libfoo.so</tt>, and located using the search path specified by the260    * <tt>LD_LIBRARY_PATH</tt> environment variable.261    * <p/>262    * If the <code>Agent_OnAttach</code> function in the agent library returns263    * an error then an {@link com.sun.tools.attach.AgentInitializationException} is264    * thrown. The return value from the <code>Agent_OnAttach</code> can then be265    * obtained by invoking the {@link266    * com.sun.tools.attach.AgentInitializationException#returnValue() returnValue}267    * method on the exception.268    *269    * @param agentLibrary The name of the agent library.270    * @param options      The options to provide to the <code>Agent_OnAttach</code>271    *                     function (can be <code>null</code>).272    * @throws AgentLoadException           If the agent library does not exist, or cannot be loaded for273    *                                      another reason.274    * @throws AgentInitializationException If the <code>Agent_OnAttach</code> function returns an error275    * @throws IOException                  If an I/O error occurs276    * @throws NullPointerException         If <code>agentLibrary</code> is <code>null</code>.277    * @see com.sun.tools.attach.AgentInitializationException#returnValue()278    */279   public abstract void loadAgentLibrary(String agentLibrary, String options)280      throws AgentLoadException, AgentInitializationException, IOException;281   /**282    * Loads an agent library.283    * <p/>284    * This convenience method works as if by invoking:285    * <p/>286    * <blockquote><tt>287    * {@link #loadAgentLibrary(String, String) loadAgentLibrary}(agentLibrary,&nbsp;null);288    * </tt></blockquote>289    *290    * @param agentLibrary The name of the agent library.291    * @throws AgentLoadException           If the agent library does not exist, or cannot be loaded for292    *                                      another reason.293    * @throws AgentInitializationException If the <code>Agent_OnAttach</code> function returns an error294    * @throws IOException                  If an I/O error occurs295    * @throws NullPointerException         If <code>agentLibrary</code> is <code>null</code>.296    */297   public void loadAgentLibrary(String agentLibrary)298      throws AgentLoadException, AgentInitializationException, IOException299   {300      loadAgentLibrary(agentLibrary, null);301   }302   /**303    * Load a native agent library by full pathname.304    * <p/>305    * A <a href="../../../../../../../../technotes/guides/jvmti/index.html">JVM TI</a> client is306    * called an <i>agent</i>. It is developed in a native language.307    * A JVM TI agent is deployed in a platform specific manner but it is typically the308    * platform equivalent of a dynamic library. This method causes the given agent309    * library to be loaded into the target VM (if not already loaded).310    * It then causes the target VM to invoke the <code>Agent_OnAttach</code> function311    * as specified in the312    * <a href="../../../../../../../../technotes/guides/jvmti/index.html"> JVM Tools313    * Interface</a> specification. Note that the <code>Agent_OnAttach</code>314    * function is invoked even if the agent library was loaded prior to invoking315    * this method.316    * <p/>317    * The agent library provided is the absolute path from which to load the318    * agent library. Unlike {@link #loadAgentLibrary loadAgentLibrary}, the library name319    * is not expanded in the target virtual machine.320    * <p/>321    * If the <code>Agent_OnAttach</code> function in the agent library returns322    * an error then an {@link com.sun.tools.attach.AgentInitializationException} is323    * thrown. The return value from the <code>Agent_OnAttach</code> can then be324    * obtained by invoking the {@link325    * com.sun.tools.attach.AgentInitializationException#returnValue() returnValue}326    * method on the exception.327    *328    * @param agentPath The full path of the agent library.329    * @param options   The options to provide to the <code>Agent_OnAttach</code>330    *                  function (can be <code>null</code>).331    * @throws AgentLoadException           If the agent library does not exist, or cannot be loaded for332    *                                      another reason.333    * @throws AgentInitializationException If the <code>Agent_OnAttach</code> function returns an error334    * @throws IOException                  If an I/O error occurs335    * @throws NullPointerException         If <code>agentPath</code> is <code>null</code>.336    * @see com.sun.tools.attach.AgentInitializationException#returnValue()337    */338   public abstract void loadAgentPath(String agentPath, String options)339      throws AgentLoadException, AgentInitializationException, IOException;340   /**341    * Load a native agent library by full pathname.342    * <p/>343    * This convenience method works as if by invoking:344    * <p/>345    * <blockquote><tt>346    * {@link #loadAgentPath(String, String) loadAgentPath}(agentLibrary,&nbsp;null);347    * </tt></blockquote>348    *349    * @param agentPath The full path to the agent library.350    * @throws AgentLoadException           If the agent library does not exist, or cannot be loaded for351    *                                      another reason.352    * @throws AgentInitializationException If the <code>Agent_OnAttach</code> function returns an error353    * @throws IOException                  If an I/O error occurs354    * @throws NullPointerException         If <code>agentPath</code> is <code>null</code>.355    */356   public void loadAgentPath(String agentPath)357      throws AgentLoadException, AgentInitializationException, IOException358   {359      loadAgentPath(agentPath, null);360   }361   /**362    * Loads an agent.363    * <p/>364    * <p> The agent provided to this method is a path name to a JAR file on the file365    * system of the target virtual machine. This path is passed to the target virtual366    * machine where it is interpreted. The target virtual machine attempts to start367    * the agent as specified by the {@link java.lang.instrument} specification.368    * That is, the specified JAR file is added to the system class path (of the target369    * virtual machine), and the <code>agentmain</code> method of the agent class, specified370    * by the <code>Agent-Class</code> attribute in the JAR manifest, is invoked. This371    * method completes when the <code>agentmain</code> method completes.372    *373    * @param agent   Path to the JAR file containing the agent.374    * @param options The options to provide to the agent's <code>agentmain</code>375    *                method (can be <code>null</code>).376    * @throws AgentLoadException           If the agent does not exist, or cannot be started in the manner377    *                                      specified in the {@link java.lang.instrument} specification.378    * @throws AgentInitializationException If the <code>agentmain</code> throws an exception379    * @throws IOException                  If an I/O error occurs380    * @throws NullPointerException         If <code>agent</code> is <code>null</code>.381    */382   public abstract void loadAgent(String agent, String options)383      throws AgentLoadException, AgentInitializationException, IOException;384   /**385    * Loads an agent.386    * <p/>387    * This convenience method works as if by invoking:388    * <p/>389    * <blockquote><tt>390    * {@link #loadAgent(String, String) loadAgent}(agent,&nbsp;null);391    * </tt></blockquote>392    *393    * @param agent Path to the JAR file containing the agent.394    * @throws AgentLoadException           If the agent does not exist, or cannot be started in the manner395    *                                      specified in the {@link java.lang.instrument} specification.396    * @throws AgentInitializationException If the <code>agentmain</code> throws an exception397    * @throws IOException                  If an I/O error occurs398    * @throws NullPointerException         If <code>agent</code> is <code>null</code>.399    */400   public void loadAgent(String agent)401      throws AgentLoadException, AgentInitializationException, IOException402   {403      loadAgent(agent, null);404   }405   /**406    * Returns the current system properties in the target virtual machine.407    * <p/>408    * This method returns the system properties in the target virtual409    * machine. Properties whose key or value is not a <tt>String</tt> are410    * omitted. The method is approximately equivalent to the invocation of the411    * method {@link java.lang.System#getProperties System.getProperties}412    * in the target virtual machine except that properties with a key or413    * value that is not a <tt>String</tt> are not included.414    * <p/>415    * This method is typically used to decide which agent to load into416    * the target virtual machine with {@link #loadAgent loadAgent}, or417    * {@link #loadAgentLibrary loadAgentLibrary}. For example, the418    * <code>java.home</code> or <code>user.dir</code> properties might be419    * use to create the path to the agent library or JAR file.420    *421    * @return The system properties422    * @throws IOException If an I/O error occurs423    * @see java.lang.System#getProperties424    * @see #loadAgentLibrary425    * @see #loadAgent426    */427   public abstract Properties getSystemProperties() throws IOException;428   /**429    * Returns the current <i>agent properties</i> in the target virtual430    * machine.431    * <p/>432    * The target virtual machine can maintain a list of properties on433    * behalf of agents. The manner in which this is done, the names of the434    * properties, and the types of values that are allowed, is implementation435    * specific. Agent properties are typically used to store communication436    * end-points and other agent configuration details. For example, a debugger437    * agent might create an agent property for its transport address.438    * <p/>439    * This method returns the agent properties whose key and value is a440    * <tt>String</tt>. Properties whose key or value is not a <tt>String</tt>441    * are omitted. If there are no agent properties maintained in the target442    * virtual machine then an empty property list is returned.443    *444    * @return The agent properties445    * @throws IOException If an I/O error occurs446    */447   public abstract Properties getAgentProperties() throws IOException;448   /**449    * Returns a hash-code value for this VirtualMachine. The hash450    * code is based upon the VirtualMachine's components, and satisfies451    * the general contract of the Object.hashCode method.452    *453    * @return A hash-code value for this virtual machine454    */455   public int hashCode()456   {457      if (hash != 0) {458         return hash;459      }460      hash = provider.hashCode() * 127 + id.hashCode();461      return hash;462   }463   /**464    * Tests this VirtualMachine for equality with another object.465    * <p/>466    * <p> If the given object is not a VirtualMachine then this467    * method returns <tt>false</tt>. For two VirtualMachines to468    * be considered equal requires that they both reference the same469    * provider, and their {@link VirtualMachineDescriptor#id() identifiers} are equal. </p>470    * <p/>471    * <p> This method satisfies the general contract of the {@link472    * java.lang.Object#equals(Object) Object.equals} method. </p>473    *474    * @param ob The object to which this object is to be compared475    * @return <tt>true</tt> if, and only if, the given object is476    *         a VirtualMachine that is equal to this477    *         VirtualMachine.478    */479   public boolean equals(Object ob)480   {481      if (ob == this) {482         return true;483      }484      if (!(ob instanceof VirtualMachine)) {485         return false;486      }487      VirtualMachine other = (VirtualMachine) ob;488      return other.provider() == provider() && other.id().equals(id());489   }490   /**491    * Returns the string representation of the <code>VirtualMachine</code>.492    */493   public String toString()494   {495      return provider.toString() + ": " + id;496   }497}...

provider

Using AI Code Generation

1import com.sun.tools.attach.VirtualMachine;2import com.sun.tools.attach.VirtualMachineDescriptor;3import java.io.IOException;4import java.util.List;5public class AttachTest {6    public static void main(String[] args) throws IOException {7        List<VirtualMachineDescriptor> vms = VirtualMachine.list();8        for (VirtualMachineDescriptor vmd : vms) {9            System.out.println(vmd.displayName());10            System.out.println(vmd.id());11            System.out.println(vmd.provider());12        }13        VirtualMachine vm = VirtualMachine.attach("15108");14        System.out.println(vm.getSystemProperties());15        System.out.println(vm.getAgentProperties());16        System.out.println(vm.getSystemProperties());17        System.out.println(vm.getAgentProperties());18        vm.detach();19    }20}

provider

Using AI Code Generation

1import com.sun.tools.attach.VirtualMachine;2public class AttachTest {3    public static void main(String[] args) throws Exception {4        String pid = "12345";5        String agent = "C:\\path\\to\\agent.jar";6        VirtualMachine vm = VirtualMachine.attach(pid);7        vm.loadAgent(agent);8        vm.detach();9    }10}11import com.sun.tools.attach.VirtualMachine;12import com.sun.tools.attach.VirtualMachineDescriptor;13public class AttachTest {14    public static void main(String[] args) throws Exception {15        String agent = "C:\\path\\to\\agent.jar";16        for (VirtualMachineDescriptor vmd : VirtualMachine.list()) {17            if (vmd.displayName().startsWith("MyApp")) {18                VirtualMachine vm = VirtualMachine.attach(vmd);19                vm.loadAgent(agent);20                vm.detach();21                break;22            }23        }24    }25}26import com.sun.tools.attach.VirtualMachine;27import com.sun.tools.attach.VirtualMachineDescriptor;28public class AttachTest {29    public static void main(String[] args) throws Exception {30        String agent = "C:\\path\\to\\agent.jar";31        for (VirtualMachineDescriptor vmd : VirtualMachine.list()) {32            if (vmd.displayName().startsWith("MyApp")) {33                VirtualMachine vm = VirtualMachine.attach(vmd.id());34                vm.loadAgent(agent);35                vm.detach();36                break;37            }38        }39    }40}41import com.sun.tools.attach.VirtualMachine;42import com.sun.tools.attach.VirtualMachineDescriptor;43public class AttachTest {44    public static void main(String[] args) throws Exception {45        String agent = "C:\\path\\to\\agent.jar";46        for (VirtualMachineDescriptor vmd : VirtualMachine.list()) {47            if (vmd.displayName().startsWith("MyApp")) {48                VirtualMachine vm = VirtualMachine.attach(vmd.id());49                for (String agentPath : vm.getSystemProperties().get("java.class.path").split(";")) {50                    if (agentPath.endsWith("agent.jar")) {51                        vm.loadAgent(agentPath);52                        break;53                    }54                }55                vm.detach();56                break;57            }58        }59    }60}

provider

Using AI Code Generation

1import java.io.IOException;2import java.util.List;3import java.util.ArrayList;4import java.util.Arrays;5import com.sun.tools.attach.AttachNotSupportedException;6import com.sun.tools.attach.VirtualMachine;7import com.sun.tools.attach.VirtualMachineDescriptor;8public class JvmClassLister {9    public static void main(String[] args) throws IOException, AttachNotSupportedException {10        List<String> classList = new ArrayList<String>();11        VirtualMachineDescriptor vmd = null;12        VirtualMachine vm = null;13        String pid = null;14        String[] classListArray = null;15        if (args.length == 0) {16            pid = getPid();17        } else {18            pid = args[0];19        }20        if (pid == null) {21            System.out.println("No pid found");22            System.exit(1);23        }24        vmd = VirtualMachineDescriptor.findByPid(Integer.parseInt(pid));25        if (vmd == null) {26            System.out.println("No vm found for pid " + pid);27            System.exit(1);28        }29        vm = VirtualMachine.attach(vmd);30        classListArray = vm.getSystemProperties().getProperty("java.class.path").split(":");31        vm.detach();32        classList = Arrays.asList(classListArray);33        System.out.println(classList);34    }35    public static String getPid() {36        String pid = null;37        String vmName = ManagementFactory.getRuntimeMXBean().getName();38        if (vmName != null) {39            pid = vmName.split("@")[0];40        }41        return pid;42    }43}44[java] [C:\Users\user\Documents\java\java\jvm\jvmclasslister\bin] java -cp "C:\Program Files\Java\jdk1.8.0_121\lib\tools.jar;." jvmclasslister.JvmClassLister

provider

Using AI Code Generation

1import java.io.IOException;2import java.util.List;3import com.sun.tools.attach.*;4public class AttachProviderTest {5    public static void main(String[] args) throws IOException, AttachNotSupportedException {6        List<VirtualMachineDescriptor> list = VirtualMachine.list();7        String pid = list.get(0).id();8        System.out.println("pid: " + pid);9        VirtualMachine vm = VirtualMachine.attach(pid);10        System.out.println("vm: " + vm);11    }12}13import java.io.IOException;14import java.util.List;15import com.sun.tools.attach.*;16public class AttachTest {17    public static void main(String[] args) throws IOException, AttachNotSupportedException {18        List<VirtualMachineDescriptor> list = VirtualMachine.list();19        String pid = list.get(0).id();20        System.out.println("pid: " + pid);21        VirtualMachine vm = VirtualMachine.attach(pid);22        System.out.println("vm: " + vm);23        vm.detach();24    }25}26import java.io.IOException;27import java.util.List;28import com.sun.tools.attach.*;29public class AttachTest {30    public static void main(String[] args) throws IOException, AttachNotSupportedException {31        List<VirtualMachineDescriptor> list = VirtualMachine.list();32        String pid = list.get(0).id();33        System.out.println("pid: " + pid);34        VirtualMachine vm = VirtualMachine.attach(pid);35        System.out.println("vm: " + vm);36        vm.detach();37    }38}39import java.io.IOException;40import java.util.List;41import com.sun.tools.attach.*;42public class AttachTest {43    public static void main(String[] args) throws IOException, AttachNotSupportedException {44        List<VirtualMachineDescriptor> list = VirtualMachine.list();

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