Develop Reference

need help figuring out why Im getting an exception on axlPort.getPhone(axlParams) call

I am attempting to run the axl demo shown at 'https://developer.cisco.com/docs/axl/#!javajax-ws-quickstart'
I am a newbie to axl, eclipse, and java, and just trying to get my toes wet.
I have followed the instructions listed and the project only shows 1 error at line:
GetPhoneRes getPhoneResponse = axlPort.getPhone(axlParams);
The error type says AXL Error.
There are no other errors showing in the compiler.
Can anyone give me any ideas of what the problem could be, or how to chase it?
package com.cisco.axl.demo;
/**
* demo to pull basic phone info
*/
import javax.xml.ws.BindingProvider;
import com.cisco.axlapiservice.AXLAPIService;
import com.cisco.axlapiservice.AXLPort;
import com.cisco.axl.api._10.*;
/**
*
** #author t01136
** Performs Getphone using AXL API
** Service Consumers were generated by the java ?? wsimport command:
** wsimport -keep -b schema/current/AXLSOAP.xsd -Xnocompile -s src -d bin -verbose schema/current/AXLAPI.wsd
* and since AXL uses HTTPS, you will have to install the UC applications
* certificate into you keystore in order to run this sample app.
* You can run the program by CD'ing to the bin folder within this project
* C:\Users\t01136.POS\eclipse-workspace\axl-demo\bin
* and running the following command
* java -cp . com.cisco.axl.demo.Demo
*/
public class Demo {
/**
* UC app host.
*/
protected static String ucHost = null;
/**
* OS admin.
*/
protected static String ucAdmin = null;
/**
* OS admin password.
*/
protected static String ucPswd = null;
/**
* phoneName used in request.
*/
protected static String phoneName = null;
/**
* Run the demo
*
* #param args not used
*/
public static void main(String[] args) {
// Verify JVM has a console
if (System.console() == null) {
System.err.println("The Cisco AXL Sample App requires a console.");
System.exit(1);
} else {
Demo.informUser("%nWelcome to the Cisco AXL Sample APP .%n");
}
Demo demo = new Demo();
demo.getPhoneInfo();
}
/**
* get information about phone
*/
public void getPhoneInfo() {
// Ask for the UC application to upgrade
// Demo.informuser("%nWhat UC server would you like to access?%n");
ucHost = promptUser(" Host: ");
ucAdmin = promptUser(" OS Admin Account: ");
ucPswd = promptUser(" OS Admin Password: ");
// Ask for the phone name
Demo.informUser("%nEnter the name of the phone you want to retrieve information about.%n");
phoneName = promptUser(" Phone Name: ");
// Make the getPhoneRequest
getPhone();
}
//private String promptUser(String string) {
// // TODO Auto-generated method stub
// return null;
// }
/**
* Makes the getPhone request and displays some of the fields that are returned.
*/
private void getPhone() {
// Instantiate the wsimport generated AXL API Service client --
// see the wsimport comments in the class javadocs above
AXLAPIService axlService = new AXLAPIService();
AXLPort axlPort = axlService.getAXLPort();
// Set the URL, user, and password on the JAX-WS client
String validatorUrl = "https://"
+ Demo.ucHost
+ ":8443/axl/";
((BindingProvider) axlPort).getRequestContext().put(
BindingProvider.ENDPOINT_ADDRESS_PROPERTY, validatorUrl);
((BindingProvider) axlPort).getRequestContext().put(
BindingProvider.USERNAME_PROPERTY, Demo.ucAdmin);
((BindingProvider) axlPort).getRequestContext().put(
BindingProvider.PASSWORD_PROPERTY, Demo.ucPswd);
// Create a GetPhoneReq object to represent the getPhone request and set the name of the device
//to name entered by user
GetPhoneReq axlParams = new GetPhoneReq();
axlParams.setName(phoneName);
//Make a call to the AXL Service and pass the getPhone request
GetPhoneRes getPhoneResponse = axlPort.getPhone(axlParams);
//display information returned in the response to the user
Demo.informUser("Product=" + getPhoneResponse.getReturn().getPhone().getProduct() + "%n"
+ getPhoneResponse.getReturn().getPhone().getLoadInformation().getValue() + "%n");
}
// -------------------- Some I/O Helper Methods ------------------------
/**
* Provide the user some instructions.
*/
protected static void informUser(String info) {
System.console().format(info);
}
/**
* Ask the user a question
*/
protected static String promptUser(String question) {
String answer = null;
while (answer==null || answer.isEmpty() ) {
answer = System.console().readLine(question);
}
return answer.trim();
}
}
Actually I have also noticed
That contained the following code:
package com.cisco.axlapiservice;
import javax.xml.ws.WebFault;
/**
* This class was generated by the JAX-WS RI.
* JAX-WS RI 2.1.6 in JDK 6
* Generated source version: 2.1
*
*/
#WebFault(name = "axlError", targetNamespace = "http://www.cisco.com/AXL/API/10.5")
public class AXLError
extends Exception
{
/**
* Java type that goes as soapenv:Fault detail element.
*
*/
private com.cisco.axl.api._10.AXLError faultInfo;
/**
*
* #param message
* #param faultInfo
*/
public AXLError(String message, com.cisco.axl.api._10.AXLError faultInfo) {
super(message);
this.faultInfo = faultInfo;
}
/**
*
* #param message
* #param faultInfo
* #param cause
*/
public AXLError(String message, com.cisco.axl.api._10.AXLError faultInfo, Throwable cause) {
super(message, cause);
this.faultInfo = faultInfo;
}
/**
*
* #return
* returns fault bean: com.cisco.axl.api._10.AXLError
*/
public com.cisco.axl.api._10.AXLError getFaultInfo() {
return faultInfo;
}
}
and when I look at the contents of 'getFaultInfo():AXLError' I see 'The serializable class AXLError does not declare a static final serialVersionUID field of type long', with 4 quick-fixes available.
But since all of that was part of the download from callmanager, I wouldnt think there would be an error in it.
Perhaps this will give someone a clue.
thanks

JNR-FFI crash after calling c function copying struct

I am trying to interface with a C library libzbc using jnr-ffi.
The first function call zbc_open works and returns a pointer to a open device. Then the next call to zbc_get_device_info causes a JVM crash.
What is the cause? How to solve it?
I think the error is somewhere in the interface of zbc or my passing parameters but searching for any documentation for JNR yielded no helpful results in google.The crash happens too if i omit the array part in the structure.
I am using the project of jnr-fuse as a starting point because my goal is to write a FUSE filesystem.
Crash log at pastebin
C functions:
void zbc_set_log_level( char *log_level )
int zbc_open (const char *filename, int flags, struct zbc_device **dev)
void zbc_get_device_info( struct zbc_device *dev, struct zbc_device_info * info)
C structure zbc_device_info:
enum zbc_dev_type zbd_type
enum zbc_dev_model zbd_model
char zbd_vendor_id [ZBC_DEVICE_INFO_LENGTH]
uint32_t zbd_flags
uint64_t zbd_sectors
uint32_t zbd_lblock_size
uint64_t zbd_lblocks
uint32_t zbd_pblock_size
uint64_t zbd_pblocks
uint64_t zbd_max_rw_sectors
uint32_t zbd_opt_nr_open_seq_pref
uint32_t zbd_opt_nr_non_seq_write_seq_pref
uint32_t zbd_max_nr_open_seq_req
JNR interface:
public interface zbc{
public void zbc_set_log_level(String level);
public int zbc_open(String filename,int flags, PointerByReference p);
public void zbc_get_device_info(Pointer dev,zbc_device_info info);
}
public static class zbc_device_info extends Struct {
int zbd_type;
int zbd_model;
byte zbd_vendor_id[]=new byte[32];
u_int32_t zbd_flags;
u_int64_t zbd_sectors;
u_int32_t zbd_lblock_size;
u_int64_t zbd_lblocks;
u_int32_t zbd_pblock_size;
u_int64_t zbd_pblocks;
u_int64_t zbd_max_rw_sectors;
u_int32_t zbd_opt_nr_open_seq_pref;
u_int32_t zbd_opt_nr_non_seq_write_seq_pref;
u_int32_t zbd_max_nr_open_seq_pref;
protected zbc_device_info(Runtime runtime) {
super(runtime);
}
}
The main function:
public static void main(String[] args) {
zbc z = LibraryLoader.create(zbc.class).load("zbc");
Runtime runtime=Runtime.getRuntime(z);
z.zbc_set_log_level("debug");
PointerByReference pr = new PointerByReference();
int ret=z.zbc_open("/temp/test.img", IO_RDWR,pr);
zbc_device_info info=new zbc_device_info(runtime);
z.zbc_get_device_info(pr.getValue(),info);
}
JVM crash:
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007fa794300c70, pid=29106, tid=0x00007fa7bd4a4700
#
# JRE version: OpenJDK Runtime Environment (8.0_131-b11) (build 1.8.0_131-8u131-b11-2ubuntu1.16.04.3-b11)
# Java VM: OpenJDK 64-Bit Server VM (25.131-b11 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# C [jffi6917022509387828651.so+0x5c70] jffi_releaseArrays+0x60
#
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /home/mmmm/jnr-fuse/hs_err_pid29106.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.java.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

The declaration of Struct is incorrect. The fields are not declared. Try to use the following declaration:
package com.github.goto1134.libzbc;
import jnr.ffi.Runtime;
import jnr.ffi.Struct;
import jnr.ffi.util.EnumMapper.IntegerEnum;
public class zbc_device_info
extends Struct {
public static final int ZBC_DEVICE_INFO_LENGTH = 32;
public final Enum<zbc_dev_type> zbd_type = new Enum<>(zbc_dev_type.class);
public final Enum<zbc_dev_model> zbd_model = new Enum<>(zbc_dev_model.class);
public final UTF8String zbd_vendor_id = new UTF8String(ZBC_DEVICE_INFO_LENGTH);
public final Unsigned32 zbd_flags = new Unsigned32();
public final Unsigned64 zbd_sectors = new Unsigned64();
public final Unsigned32 zbd_lblock_size = new Unsigned32();
public final Unsigned64 zbd_lblocks = new Unsigned64();
public final Unsigned32 zbd_pblock_size = new Unsigned32();
public final Unsigned64 zbd_pblocks = new Unsigned64();
public final Unsigned64 zbd_max_rw_sectors = new Unsigned64();
public final Unsigned32 zbd_opt_nr_open_seq_pref = new Unsigned32();
public final Unsigned32 zbd_opt_nr_non_seq_write_seq_pref = new Unsigned32();
public final Unsigned32 zbd_max_nr_open_seq_req = new Unsigned32();
protected zbc_device_info(Runtime runtime) {
super(runtime);
}
public enum zbc_dev_type
implements IntegerEnum {
/**
* Unknown drive type.
*/
ZBC_DT_UNKNOWN(0x00),
/**
* Zoned block device (for kernels supporting ZBC/ZAC).
*/
ZBC_DT_BLOCK(0x01),
/**
* SCSI device.
*/
ZBC_DT_SCSI(0x02),
/**
* ATA device.
*/
ZBC_DT_ATA(0x03),
/**
* Fake device (emulation mode).
*/
ZBC_DT_FAKE(0x04);
private final int value;
zbc_dev_type(int value) {
this.value = value;
}
#Override
public int intValue() {
return value;
}
}
public enum zbc_dev_model
implements IntegerEnum {
/**
* Unknown drive model.
*/
ZBC_DM_DRIVE_UNKNOWN(0x00),
/**
* Host-aware drive model: the device type/signature is 0x00
* and the ZONED field of the block device characteristics VPD
* page B1h is 01b.
*/
ZBC_DM_HOST_AWARE(0x01),
/**
* Host-managed drive model: the device type/signature is 0x14/0xabcd.
*/
ZBC_DM_HOST_MANAGED(0x02),
/**
* Drive-managed drive model: the device type/signature is 0x00
* and the ZONED field of the block device characteristics VPD
* page B1h is 10b.
*/
ZBC_DM_DEVICE_MANAGED(0x03),
/**
* Standard block device: the device type/signature is 0x00
* and the ZONED field of the block device characteristics VPD
* page B1h is 00b.
*/
ZBC_DM_STANDARD(0x04);
private final int value;
zbc_dev_model(int value) {
this.value = value;
}
#Override
public int intValue() {
return value;
}
}
}
In hs logs there is a call stack that made the program crash. Can you provide it?

CustomloaderDep cannot be cast to CustomloaderDep?

I am getting java.lang.ClassCastException: CustomloaderDependency cannot be cast to CustomloaderDependency I know reason is two classes are loaded by different classloaders(one by customclassloader and another by default sun.misc.Launcher$AppClassLoader)
My custom class loader is not being used even after running the program with -Djava.system.class.loader=CustomClassLoader until and unless i am not explicitly doing Class.forName("CustomloaderDependency", true, ClassLoader.getSystemClassLoader() ); but when i do new CustomloaderDependency() default sun.misc.Launcher$AppClassLoader is used
Here is my custom class loader
public class CustomClassLoader extends ClassLoader {
public CustomClassLoader() {
super();
}
/**
* This constructor is used to set the parent ClassLoader
*/
public CustomClassLoader(ClassLoader parent) {
super(parent);
}
/**
* Loads the class from the file system. The class file should be located in
* the file system. The name should be relative to get the file location
*
* #param name
* Fully Classified name of class, for example com.journaldev.Foo
*/
private Class getClass(String name) throws ClassNotFoundException {
String file = name + ".class";
byte[] b = null;
try {
// This loads the byte code data from the file
b = loadClassFileData(file);
// defineClass is inherited from the ClassLoader class
// that converts byte array into a Class. defineClass is Final
// so we cannot override it
Class c = defineClass(name, b, 0, b.length);
resolveClass(c);
return c;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
/**
* Every request for a class passes through this method. If the class is in
* com.journaldev package, we will use this classloader or else delegate the
* request to parent classloader.
*
*
* #param name
* Full class name
*/
#Override
public Class loadClass(String name) throws ClassNotFoundException {
System.out.println("Loading Class '" + name + "'" );
if (name.contains("CustomloaderDependency") || name.contains("TestCustomLoader")) {
System.out.println("Loading Class using CustomClassLoader");
return getClass(name);
}
return super.loadClass(name);
}
/**
* Reads the file (.class) into a byte array. The file should be
* accessible as a resource and make sure that its not in Classpath to avoid
* any confusion.
*
* #param name
* File name
* #return Byte array read from the file
* #throws IOException
* if any exception comes in reading the file
*/
private byte[] loadClassFileData(String name) throws IOException {
/*InputStream stream = ClassLoader.getSystemClassLoader().getResourceAsStream(
name);*/
// FileInputStream stream = new FileInputStream("F:\\workspaces\\test\\Test\\bin\\"+name);
FileInputStream stream = new FileInputStream("F:\\"+name);
int size = stream.available();
byte buff[] = new byte[size];
//DataInputStream in = new DataInputStream(stream);
stream.read(buff);
stream.close();
return buff;
}
}
Here is my testing class
I am running this program with -Djava.system.class.loader=CustomClassLoader but still looks like default class loader is used for classes with which i am trying to downcast with
public class TestCustomLoader {
public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException {
Class classObject = Class.forName("CustomloaderDependency", true, ClassLoader.getSystemClassLoader() );
Object customloaderDependency = classObject.newInstance();
System.out.println("classloader from my custom is "+customloaderDependency.getClass().getClassLoader());
// above prints CustomClassLoader#15db9742
System.out.println("classloader for casting is "+CustomloaderDependency.class.getClassLoader());
// above prints sun.misc.Launcher$AppClassLoader#14dad5dc
CustomloaderDependency finalObject = (CustomloaderDependency)customloaderDependency;
//above line i am getting exception
}

I got it work by
#Override
public Class loadClass(String name) throws ClassNotFoundException {
System.out.println("Loading Class '" + name + "'" );
if (name.contains("CustomloaderDependency") || name.contains("TestCustomLoader")) {
System.out.println("Loading Class using CustomClassLoader");
return getClass(name);
}
return super.loadClass(name);
}
Before above fix, call was coming to my customclassloader to load TestCustomLoader but i was loading it through Launcher$AppClassLoader because of if (name.contains("CustomloaderDependency") ) {.
Hence all it dependents(like statically mentioned class i.e the word in the cast parentheses) were also being loaded by Launcher$AppClassLoader

How to programatically invoke a maven dependency plugin

I am trying to invoke maven-dependency-plugin programatically. i am using maven 3 version. the problem is that when i invoke it through pluginManager.executeMojo(session, execution), i receive the following error message:
[ERROR] **The parameters 'project', 'local', 'remoteRepos',
'reactorProjects' for goal
org.apache.maven.plugins:maven-dependency-plugin:2.1:unpack are
missing or invalid**
**org.apache.maven.plugin.PluginParameterException: The parameters 'project',
'local', 'remoteRepos', 'reactorProjects' for goal
org.apache.maven.plugins:maven-dependency-plugin:2.1:unpack are missing or
invalid**
at org.apache.maven.plugin.internal.DefaultMavenPluginManager
.populatePluginFields(DefaultMavenPluginManager.java:518)
at org.apache.maven.plugin.internal.DefaultMavenPluginManager
.getConfiguredMojo(DefaultMavenPluginManager.java:471)
at org.apache.maven.plugin.DefaultBuildPluginManager
.executeMojo(DefaultBuildPluginManager.java:99)
at com.sap.ldi.qi.osgi.OSGiManifesrMfHandlerMojo
.invokeMavenDependencyPlugin(OSGiManifesrMfHandlerMojo.java:139)
at com.sap.ldi.qi.osgi.OSGiManifesrMfHandlerMojo
.execute(OSGiManifesrMfHandlerMojo.java:100)
at org.apache.maven.plugin.DefaultBuildPluginManager
.executeMojo(DefaultBuildPluginManager.java:110)
at org.apache.maven.lifecycle.internal.MojoExecutor
.execute(MojoExecutor.java:144)
at org.apache.maven.lifecycle.internal.MojoExecutor
.execute(MojoExecutor.java:87)
at org.apache.maven.lifecycle.internal.MojoExecutor
.execute(MojoExecutor.java:79)
-- many lines stripped from stack trace --
[INFO] ----------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ----------------------------------------------------------------------
[INFO] Total time: 17.938s
[INFO] Finished at: Mon Nov 22 10:27:42 EET 2010
[INFO] Final Memory: 12M/23M
[INFO] ----------------------------------------------------------------------
[ERROR] Failed to execute goal
com.sap.ldi.qi:osgi-manifest-handler-plugin:0.0.1-SNAPSHOT:handle
(osgi-manifest-handler plugin) on project com.sap.ldi.demo.calc
.cmd.tests: The parameters 'project', 'local', 'remoteRepos',
'reactorProjects' for goal
org.apache.maven.plugins:maven-dependency-plugin:2.1:unpack are missing
or invalid -> [Help 1]
-- stripped rest --
As I know, the only required parameter for the unpack goal of maven dependency plugin is artifactItems. I set the plugin configuration by using PluginExecution.setConfiguration() method. It seems that this plugin configuration is not correctly set.
Do you have any idea why this exception is thrown?
Here is the configuration that I am using:
<configuration>
<artifactItems>
<artifactItem>
<groupId>com.sap.ldi.demo.calc</groupId>
<artifactId>com.sap.ldi.demo.calc.cmd</artifactId>
<version>0.1.2-SNAPSHOT</version>
<type>jar</type>
<overWrite>true</overWrite>
<outputDirectory>target/demo-calc-stuff</outputDirectory>
<includes>**/*.*</includes>
</artifactItem>
</artifactItems>
</configuration>
Thanks
One correction from my side. The used Maven version is not Maven 3.0 but Maven 3.0-beta-1. I see that BuildPluginManager.loadPlugin() in version 3.0-beta-1 has two args, and the same method in version 3.0 has three.
I am wondering, does anyone tried to invoke a maven plugin programatically with maven 3.0 or maven 3.0-beta-1. I am still trying to invoke it with maven 3.0-beta-1, but it still returns the same exception as pasted above.

Here is an updated version of Mojo Executor designed for Maven 3:
package com.googlecode.boostmavenproject;
import java.util.Collections;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.model.Plugin;
import org.apache.maven.plugin.MojoExecution;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.descriptor.PluginDescriptor;
import org.apache.maven.project.MavenProject;
import org.codehaus.plexus.util.xml.Xpp3Dom;
import org.apache.maven.plugin.BuildPluginManager;
import org.apache.maven.plugin.descriptor.MojoDescriptor;
import org.codehaus.plexus.configuration.PlexusConfiguration;
import org.codehaus.plexus.util.xml.Xpp3DomUtils;
import org.sonatype.aether.repository.RemoteRepository;
/**
* Executes an arbitrary mojo using a fluent interface. This is meant to be executed within the context of a Maven 2
* mojo.
*
* Here is an execution that invokes the dependency plugin:
* <pre>
* executeMojo(
* plugin(
* groupId("org.apache.maven.plugins"),
* artifactId("maven-dependency-plugin"),
* version("2.0")
* ),
* goal("copy-dependencies"),
* configuration(
* element(name("outputDirectory"), "${project.build.directory}/foo")
* ),
* executionEnvironment(
* project,
* session,
* pluginManager
* )
* );
* </pre>
* #see http://code.google.com/p/mojo-executor/
*/
public class MojoExecutor
{
/**
* Entry point for executing a mojo
*
* #param plugin The plugin to execute
* #param goal The goal to execute
* #param configuration The execution configuration
* #param env The execution environment
* #throws MojoExecutionException If there are any exceptions locating or executing the mojo
*/
public static void executeMojo(Plugin plugin, String goal, Xpp3Dom configuration,
ExecutionEnvironment env) throws MojoExecutionException
{
if (configuration == null)
throw new NullPointerException("configuration may not be null");
try
{
MavenSession session = env.getMavenSession();
PluginDescriptor pluginDescriptor = env.getPluginManager().loadPlugin(plugin,
Collections.<RemoteRepository>emptyList(), session.getRepositorySession());
MojoDescriptor mojo = pluginDescriptor.getMojo(goal);
if (mojo == null)
{
throw new MojoExecutionException("Could not find goal '" + goal + "' in plugin "
+ plugin.getGroupId() + ":"
+ plugin.getArtifactId() + ":"
+ plugin.getVersion());
}
configuration = Xpp3DomUtils.mergeXpp3Dom(configuration,
toXpp3Dom(mojo.getMojoConfiguration()));
MojoExecution exec = new MojoExecution(mojo, configuration);
env.getPluginManager().executeMojo(session, exec);
}
catch (Exception e)
{
throw new MojoExecutionException("Unable to execute mojo", e);
}
}
/**
* Converts PlexusConfiguration to a Xpp3Dom.
*
* #param config the PlexusConfiguration
* #return the Xpp3Dom representation of the PlexusConfiguration
*/
private static Xpp3Dom toXpp3Dom(PlexusConfiguration config)
{
Xpp3Dom result = new Xpp3Dom(config.getName());
result.setValue(config.getValue(null));
for (String name: config.getAttributeNames())
result.setAttribute(name, config.getAttribute(name));
for (PlexusConfiguration child: config.getChildren())
result.addChild(toXpp3Dom(child));
return result;
}
/**
* Constructs the {#link ExecutionEnvironment} instance fluently
* #param mavenProject The current Maven project
* #param mavenSession The current Maven session
* #param pluginManager The Build plugin manager
* #return The execution environment
* #throws NullPointerException if mavenProject, mavenSession or pluginManager
* are null
*/
public static ExecutionEnvironment executionEnvironment(MavenProject mavenProject,
MavenSession mavenSession,
BuildPluginManager pluginManager)
{
return new ExecutionEnvironment(mavenProject, mavenSession, pluginManager);
}
/**
* Builds the configuration for the goal using Elements
* #param elements A list of elements for the configuration section
* #return The elements transformed into the Maven-native XML format
*/
public static Xpp3Dom configuration(Element... elements)
{
Xpp3Dom dom = new Xpp3Dom("configuration");
for (Element e: elements)
dom.addChild(e.toDom());
return dom;
}
/**
* Defines the plugin without its version
* #param groupId The group id
* #param artifactId The artifact id
* #return The plugin instance
*/
public static Plugin plugin(String groupId, String artifactId)
{
return plugin(groupId, artifactId, null);
}
/**
* Defines a plugin
* #param groupId The group id
* #param artifactId The artifact id
* #param version The plugin version
* #return The plugin instance
*/
public static Plugin plugin(String groupId, String artifactId, String version)
{
Plugin plugin = new Plugin();
plugin.setArtifactId(artifactId);
plugin.setGroupId(groupId);
plugin.setVersion(version);
return plugin;
}
/**
* Wraps the group id string in a more readable format
* #param groupId The value
* #return The value
*/
public static String groupId(String groupId)
{
return groupId;
}
/**
* Wraps the artifact id string in a more readable format
* #param artifactId The value
* #return The value
*/
public static String artifactId(String artifactId)
{
return artifactId;
}
/**
* Wraps the version string in a more readable format
* #param version The value
* #return The value
*/
public static String version(String version)
{
return version;
}
/**
* Wraps the goal string in a more readable format
* #param goal The value
* #return The value
*/
public static String goal(String goal)
{
return goal;
}
/**
* Wraps the element name string in a more readable format
* #param name The value
* #return The value
*/
public static String name(String name)
{
return name;
}
/**
* Constructs the element with a textual body
* #param name The element name
* #param value The element text value
* #return The element object
*/
public static Element element(String name, String value)
{
return new Element(name, value);
}
/**
* Constructs the element containg child elements
* #param name The element name
* #param elements The child elements
* #return The Element object
*/
public static Element element(String name, Element... elements)
{
return new Element(name, elements);
}
/**
* Element wrapper class for configuration elements
*/
public static class Element
{
private final Element[] children;
private final String name;
private final String text;
public Element(String name, Element... children)
{
this(name, null, children);
}
public Element(String name, String text, Element... children)
{
this.name = name;
this.text = text;
this.children = children;
}
public Xpp3Dom toDom()
{
Xpp3Dom dom = new Xpp3Dom(name);
if (text != null)
{
dom.setValue(text);
}
for (Element e: children)
{
dom.addChild(e.toDom());
}
return dom;
}
}
/**
* Collects Maven execution information
*/
public static class ExecutionEnvironment
{
private final MavenProject mavenProject;
private final MavenSession mavenSession;
private final BuildPluginManager pluginManager;
public ExecutionEnvironment(MavenProject mavenProject, MavenSession mavenSession,
BuildPluginManager pluginManager)
{
if (mavenProject == null)
throw new NullPointerException("mavenProject may not be null");
if (mavenSession == null)
throw new NullPointerException("mavenSession may not be null");
if (pluginManager == null)
throw new NullPointerException("pluginManager may not be null");
this.mavenProject = mavenProject;
this.mavenSession = mavenSession;
this.pluginManager = pluginManager;
}
public MavenProject getMavenProject()
{
return mavenProject;
}
public MavenSession getMavenSession()
{
return mavenSession;
}
public BuildPluginManager getPluginManager()
{
return pluginManager;
}
}
}
I will attempt to contribute my changes back into the official Mojo Executor plugin.

Folks, I think I get it.
The problem is not in the version of Maven that I am using. It is in the configuration that I am using for invoking maven-dependency-plugin. The unpack goal of maven-dependency-plugin requires the following parameters: artifactItems, local, project, reactorProjects and remoteRepos. Here is the correct version of the configuration used for invoking the plugin:
<configuration>
<artifactItems>
<artifactItem>
<groupId>com.sap.ldi.demo.calc</groupId>
<artifactId>com.sap.ldi.demo.calc.cmd</artifactId>
<version>0.1.3-SNAPSHOT</version>
<type>jar</type>
<overWrite>true</overWrite>
<outputDirectory>target/demo-calc-stuff</outputDirectory>
<includes>**/*.*</includes>
</artifactItem>
</artifactItems>
<local>${localRepository}</local>
<project>${project}</project>
<reactorProjects>${reactorProjects}</reactorProjects>
<remoteRepos>${project.remoteArtifactRepositories}</remoteRepos>
</configuration>`

Maven Plugins are not meant to be invoked programmatically.
They rely on values that are injected by the underlying plexus container.
So either you will have to find out how to inject those values or you will have to rely on the default mechanism.
One thing you can use is the Maven Invoker. With that, you can programmatically launch maven lifecycles, but they will execute in a separate VM. So if you need to change the model dynamically beforehand, you will need to serialize the model out to a temporary pom.xml and use that with maven invoker. This is heavy stuff, but I have done it successfully some two years ago.

How to capture video using JMF, but without installing JMF

A videoconferencing project I was working on used JMF to capture video and audio, and transmit it to another endpoint. An issue was that my team didn't want the user of the product to have to install JMF.
I thought it might be worthwhile to share our solution to this problem. It works. It works well. My question to you is: does anyone have a better way to do it?
Environment: Windows, XP and above
Download JMF for Windows
Install it on your machine
Locate the following dlls in the system32 folder after jmf installs:
jmacm.dll
jmam.dll
jmcvid.dll
jmdaud.dll
jmdaudc.dll
jmddraw.dll
jmfjawt.dll
jmg723.dll
jmgdi.dll
jmgsm.dll
jmh261.dll
jmh263enc.dll
jmjpeg.dll
jmmci.dll
jmmpa.dll
jmmpegv.dll
jmutil.dll
jmvcm.dll
jmvfw.dll
jmvh263.dll
jsound.dll
Copy the dlls into a temporary folder
Locate the jmf.properties file (Do a search on your computer for it)
Download the JMF source code
In the source code, find the following files:
JMFinit.java
JMRPropertiesGen.java
Registry.java
RegistryGen.java
Create a package; I'll call it JMFNoInstall
Add the files listed in step 6
Add a class called Main to this package as such:
package JMFNoInstall;
// add your imports and whatnot here
public class Main()
{
public Main()
{
JMFinit.main(null);
JMFPropertiesGen.main(null);
Registry.main(null);
RegistryGen.main(new String[] {
new File(".").getAbsolutePath(),
"registrylib"
});
}
}
The jmf.properties file needs to go in the same folder as the class that has your main method or the same folder as the JAR archive that contains the main method.
The dlls need to go into the win32 folder. You can have your program check to see if they are in the win32 folder. If they are not, you can have it copy them over from some location. The jmf.properties file gets updated whenever the the Main class listed above runs. You only need to run this once, the first time the program is ever run, or if the user would like to add new capture devices. Lastly, just make sure the jmf.jar file and jmfcom.jar that comes along with the Windows JMF download is included in the classpath. You're good to go at this point. All the functionality of JMF without actually having to install it.
There really isn't a lot of work involved with this, and you can incorporate it into your custom installer quite easily.
Has anyone found a better way to do this though? There are a few pitfalls of doing it this way.
EDIT: I thought it might be worthwhile to share some of the code that I created. Of course youll need to modify it to handle what you. It prob wont compile, but the stuff that is missing should be easy enough to recreate. But thought it might be a good starting point to help people. The detectCaptureDevices function is probably what will help most people. Ill update this class as I go.
import GUI.Window;
import GlobalUtilities.OS;
import GlobalUtilities.ProgressBar;
import GlobalUtilities.FileUtilities;
import java.io.File;
import java.util.ArrayList;
import java.util.Vector;
import javax.swing.text.Utilities;
/**
* This class providex easy access to the most needed info about JMF. You can test
* a JMF install (Windows only currently) and also get info about the captrue
* devices hooked up to JMF.
* #author dvargo
*/
public class JMFRunner
{
/**
* Show the status of operations
*/
final ProgressBar theBar = new ProgressBar();
/**
* Location where the dll's JMF relies on need to be placed
*/
final String windowsDllFolder = "C:\\WINDOWS\\system32\\";
final String linuxDllFolder = "/usr/lib/";
/**
* Dll's that JMF uses
*/
final String[] windowsDllList = new String[]{
"jmacm.dll",
"jmam.dll",
"jmcvid.dll",
"jmdaud.dll",
"jmdaudc.dll",
"jmddraw.dll",
"jmfjawt.dll",
"jmg723.dll",
"jmgdi.dll",
"jmgsm.dll",
"jmh261.dll",
"jmh263enc.dll",
"jmjpeg.dll",
"jmmci.dll",
"jmmpa.dll",
"jmmpegv.dll",
"jmutil.dll",
"jmvcm.dll",
"jmvfw.dll",
"jmvh263.dll",
"jsound.dll"};
String[] linuxDllList = new String[]{
"libjmcvid.so",
"libjmdaud.so",
"libjmfjawt.so",
"libjmg723.so",
"libjmgsm.so",
"libjmh261.so",
"libjmh263enc.so",
"libjmjpeg.so",
"libjmmpa.so",
"libjmmpegv.so",
"libjmmpx.so",
"libjmutil.so",
"libjmv4l.so",
"libjmxlib.so"
};
String [] dlls= null;
String dir = null;
/**
* List of the video capture devices found by JMF
*/
Vector videoDevices = null;
/**
* List of the audio capture devices found by JMF
*/
Vector audioDevices = null;
public JMFRunner()
{
if(OS.isWindows())
{
dlls = windowsDllList;
dir = windowsDllFolder;
}
else if(OS.isLinux())
{
dlls = linuxDllList;
dir = linuxDllFolder;
}
else
{
Window.getLogger().severe("Operating system does not support JMF");
}
}
/**
* Adds new capture devices
*/
public void detectCaptureDecives()
{
Thread theTread = new Thread(theBar);
theTread.start();
theBar.repaint();
JMFInit.main(new String[] {""});
JMFPropertiesGen.main(new String[] {""});
Registry.main(new String[] {""});
RegistryGen.main(new String[] {"-d",
new File(".").getAbsolutePath(),
"registrylib"
});
theBar.setMessage("");
theBar.stop();
}
/**
* Verifies that all the dll's that JMF needs are in their correct spot
* #return True if all dlls are in their correct spot, false otherwise
*/
public boolean detectDlls()
{
boolean retVal = true;
String currFile;
for(String currDll : dlls)
{
currFile = dir + currDll;
if(! new File(currFile).exists())
{
Window.getLogger().severe("Can not find dll " + currFile + " for JMF");
retVal = false;
}
}
return retVal;
}
//Doesnt work quite yet
public boolean installLibraryFiles()
{
boolean retVal = true;
String currFile;
for(String currDll : dlls)
{
currFile = dir + currDll;
File newDll = new File(currFile);
//see if this dll is already there
if(!newDll.exists())
{
//its not there so lets copy it
try
{
FileUtilities.copy(newDll,FileUtilities.getResourceFile("/JMFManager/Resources/"+currDll,currDll));
}
catch(Exception e)
{
retVal = false;
}
}
}
return retVal;
}
/**
* Returns the location of the jmf.properties file that STix is using
* #return THe locaiton of the JMF properties
*/
public String getJMFPropertiesFileLocation()
{
return Registry.getJMFPropertiesFileLocation();
}
/**
* Returns a list of the audio devices found by JMF
* #return Returns an Arraylist containing info about the audio capture devices
*/
public ArrayList getAudioDevices()
{
DeviceFinder df = new DeviceFinder();
audioDevices = df.getSoundCaptureDevices();
return new ArrayList(audioDevices);
}
/**
* Returns a list of the video decives deteced by JMF
* #return returns an arraylist with info of the video capture devices
*/
public ArrayList getVideoDevices()
{
DeviceFinder df = new DeviceFinder();
videoDevices = df.getVideoCaptureDevices();
return new ArrayList(videoDevices);
}
public static void main(String [] args)
{
JMFRunner x = new JMFRunner();
//x.detectCaptureDecives();
x.installLibraryFiles();
System.out.println(x.detectDlls());
System.out.println(x.getJMFPropertiesFileLocation());
System.out.println(x.getAudioDevices());
System.out.println(x.getVideoDevices());
}
}
DeviceFinder.java
import java.util.Vector;
import javax.media.*;
import javax.media.format.*;
/**
* this class gets information about capture devices (mics and cameras)
*/
public class DeviceFinder {
Vector videoDevices = new Vector();
Vector audioDevices = new Vector();
/**
* Constructor
* Creates a new DeviceFinder
*/
public DeviceFinder()
{
/*retrieve ALL video and audio devices*/
videoDevices = CaptureDeviceManager.getDeviceList(new VideoFormat(null));
audioDevices = CaptureDeviceManager.getDeviceList(new AudioFormat(null));
}
/**
* purpose: Get information on all Video capture devices on the system
* #return java.util.Vector a vector of attributes
*/
public Vector getVideoCaptureDevices()
{
return videoDevices;
}
/**
* purpose: Get information on all audio capture devices on the system
* #return java.util.Vector a vector of attributes
*/
public Vector getSoundCaptureDevices()
{
return audioDevices;
}
/**
* retrieve the first video capture device
*/
public CaptureDeviceInfo getPrimaryVideoCaptureDevice()
{
return (CaptureDeviceInfo)videoDevices.get(0);
}
/*retrieve the first audio capture device*/
public CaptureDeviceInfo getPrimaryAudioCaptureDevice()
{
return (CaptureDeviceInfo)audioDevices.get(0);
}
/**
* get the first video device name
* #return String the name of the video device
*/
public String getVideoCaptureDeviceName()
{
return ((CaptureDeviceInfo)videoDevices.get(0)).getName();
}
/**
* get the first audio device name
* #return String the name of the audio device
*/
public String getAudioCaptureDeviceName()
{
return ((CaptureDeviceInfo)audioDevices.get(0)).getName();
}
/**
* get the first video device media locator
* #return MediaLocator
*/
public MediaLocator getVideoMediaLocator()
{
return ((CaptureDeviceInfo)videoDevices.get(0)).getLocator();
}
/**
* get the first audio device media locator
* #return MediaLocator
*/
public MediaLocator getAudioMediaLocator()
{
return ((CaptureDeviceInfo)audioDevices.get(0)).getLocator();
}
/**
* get the video device media locator at index idx
* #param idx index of the media locator (0 is the first/default,
* as ordered by
* the JMFRegistry)
* #return MediaLocator
*/
public MediaLocator getVideoMediaLocator(int idx)
{
if(idx >= videoDevices.size())
{
return null;
}
return ((CaptureDeviceInfo)videoDevices.get(idx)).getLocator();
}
/**
* get the audio device media locator at index idx
* #param idx index of the audio device (as ordered by the JMFRegistry)
* #return MediaLocator
*/
public MediaLocator getAudioMediaLocator(int idx)
{
return ((CaptureDeviceInfo)audioDevices.get(idx)).getLocator();
}
/**
*
* #param args
*/
public static void main(String[] args)
{
DeviceFinder df = new DeviceFinder();
//DEBUG:
System.out.println(df.getVideoMediaLocator());
System.out.println(df.getAudioMediaLocator());
}
}

I don't think there is a better way. Unless the DLLs are explicitly loaded by path name, you would just need to make sure they are in the system path, so if they lived right next to the JVM executables it should also work. Windows does implicitly include the directory the program was started from in the system path, so that is another potential location.
Installers are a double edged sword, they make it easy to add new functionality and remove it later, but they also make it harder to deploy solutions that use the product.
One of the nice things about Java in general is that you don't have to install it for it to work. Essentially, once you perform the install of the JRE on one system, you can bundle it up and use it on another system as a zip file. Java doesn't need to explicitly register the DLLs because it loads them dynamically as needed.