OUTPUT=$(command)
echo $OUTPUT

If you have longer running commands where you want to display stdout in realtime and also store it in a variable you can tee the output to stderr:

OUTPUT=$(command | tee /dev/stderr)

OUTPUT=$(command | tee /proc/self/fd/2)

OUTPUT=$(command | tee >(cat - >&2))

If you have longer running commands where you want to display stdout/stderr in realtime and also store stderr in a variable it gets a bit complicated.
However, this can be achieved by switching stdout and stderr and then teeing the new stdout (which is stderr now) back to stderr for console output.

ERROR=$(command 3>&1 1>&2 2>&3 | tee /dev/stderr)

ERROR=$(command 3>&1 1>&2 2>&3 | tee /proc/self/fd/2)

ERROR=$(command 3>&1 1>&2 2>&3 | tee >(cat - >&2))

Good reading:
Bash FAQ: How can I store the return value/output of a command in a variable?

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HbDataStoreWithDataSource.java:

package de.sebthom.util;

import java.sql.*;
import java.util.Properties;
import javax.sql.DataSource;
import org.eclipse.emf.teneo.PersistenceOptions;
import org.eclipse.emf.teneo.hibernate.HbSessionDataStore;
import org.hibernate.HibernateException;
import org.hibernate.cfg.*;
import org.hibernate.connection.ConnectionProvider;

/**
 * @author Sebastian Thomschke
 */
public class HbDataStoreWithDataSource extends HbSessionDataStore {
  public final static class CustomConnectionProvider implements ConnectionProvider {
    private DataSource ds;

    public void close() throws HibernateException { }

    public void closeConnection(final Connection conn) throws SQLException {
      conn.close();
    }

    public void configure(final Properties props) throws HibernateException {
      ds = _CONFIG_TIME_DS_HOLDER.get();
    }

    public Connection getConnection() throws SQLException {
      return ds.getConnection();
    }

   public boolean supportsAggressiveRelease() {
     return false;
   }
  }

  private static final long serialVersionUID = 1L;
  private static HbDataStoreWithDataSource INSTANCE;

  /**
   * the data source holder acts as a thread safe bridge between the DSConnectionProvider which is instantiated by Hibernate internally
   * and the data source injected into the session factory during spring configuration time.
   */
  private static final ThreadLocal _CONFIG_TIME_DS_HOLDER = new ThreadLocal();

  public static HbDataStoreWithDataSource getInstance() {
		return INSTANCE;
  }

  private final Properties props = new Properties();

  public HbDataStoreWithDataSource() {
    INSTANCE = this;

    props.setProperty(PersistenceOptions.ADD_INDEX_FOR_FOREIGN_KEY, "true");
    props.setProperty(PersistenceOptions.FETCH_CONTAINMENT_EAGERLY, "false");
    props.setProperty(PersistenceOptions.FETCH_ASSOCIATION_EXTRA_LAZY, "false");

    // tell Teneo to not change the table names, we do this using Hibernate's ImprovedNamingStrategy
    props.setProperty(PersistenceOptions.SQL_CASE_STRATEGY, "none");
    props.setProperty(PersistenceOptions.MAXIMUM_SQL_NAME_LENGTH, "-1");
  }

  protected Configuration createConfiguration() {
    Configuration cfg = super.createConfiguration();
    cfg.setNamingStrategy(ImprovedNamingStrategy.INSTANCE);

    // only if a DS is injected we register our connection provider
    if (_CONFIG_TIME_DS_HOLDER.get() != null)
      cfg.setProperty(Environment.CONNECTION_PROVIDER, CustomConnectionProvider.class.getName());
    return cfg;
  }

  public void setDataSource(final DataSource ds) {
    _CONFIG_TIME_DS_HOLDER.set(ds);
  }

  public final void setHibernateProperties(final Properties hibernateProperties) {
    throw new UnsupportedOperationException();
  }

  public final void setPersistenceProperties(final Properties persistenceOptions) {
    throw new UnsupportedOperationException();
  }

  public void setProperties(final Properties props) {
    this.props.putAll(props);
    super.setProperties(this.props);
  }
}

web.xml:

  openSessionInViewFilter
  org.springframework.orm.hibernate3.support.OpenSessionInViewFilter
    
singleSession
true
    
    
sessionFactoryBeanName
realSessionFactory
    


  openSessionInViewFilter
  /*
  REQUEST
  ERROR

applicationContext.xml:

  

  

      
${jdbc.driverClassName}
${jdbc.url}
${jdbc.username}
${jdbc.password}
false
${jdbc.maxConnections}
${jdbc.minConnections}
10000
${jdbc.minConnections}
${jdbc.validationQuery}
false
true
1200000
1800000
5
      
    
  

  

      hibernate.dialect=${hibernate.dialect}
      hibernate.hbm2ddl.auto=${hibernate.hbm2ddl.auto}
      hibernate.jdbc.batch_size=2000
      hibernate.show_sql=${hibernate.show_sql}
      hibernate.transaction.auto_close_session=false
      hibernate.current_session_context_class=org.springframework.orm.hibernate3.SpringSessionContext
      hibernate.transaction.factory_class=org.springframework.orm.hibernate3.SpringTransactionFactory
    

com.acme.ShopPackageImpl
  

  

  

  

Comments:

1. VERY IMPORTANT:The HibernateTransactionManager does NOT get the teneoSessionFactory(HbSessionDataStore) object passed in as sessionFactory, but the underlying Hibernate SessionFactory that can be retrieved from the HbSessionDataStore via the getSessionFactory() method. Not doing so will result in duplicate Hibernate Sessions completely breaking the transaction managment. This happens because in that case the TransactionSynchronizationManager will sometimes internally bind the hibernate session to the current thread based on different keys and thus does not find it again. Here are some stacktraces showing the problem:

   TransactionSynchronizationManager.bindResource(Object, Object) line: 170
   at OpenSessionInViewFilter.doFilterInternal(HttpServletRequest, HttpServletResponse, FilterChain) line: 183
   => results in TransactionSynchronizationManager.bindResource(HbSessionDataStore, SessionHolder) => as key the Teneo SessionFactory is used
   
   TransactionSynchronizationManager.bindResource(Object, Object) line: 170
   at SessionFactoryUtils.doGetSession(SessionFactory, Interceptor, SQLExceptionTranslator, boolean) line: 339
   at SessionFactoryUtils.doGetSession(SessionFactory, boolean) line: 256
   at SpringSessionContext.currentSession() line: 60
   at SessionFactoryImpl.getCurrentSession() line: 700
   at HbSessionDataStore(HbBaseSessionDataStore).getCurrentSession() line: 161
   => results in TransactionSynchronizationManager.bindResource(SessionFactoryImpl, SessionHolder) => as key the Hibernate SessionFactory is used
   
   TransactionSynchronizationManager.bindResource(Object, Object) line: 170
   at HibernateTransactionManager.doBegin(Object, TransactionDefinition) line: 577
   at HibernateTransactionManager(AbstractPlatformTransactionManager).getTransaction(TransactionDefinition) line: 371
   at TransactionInterceptor(TransactionAspectSupport).createTransactionIfNecessary(PlatformTransactionManager, TransactionAttribute, String) line: 316
   at TransactionInterceptor.invoke(MethodInvocation) line: 105
   at ReflectiveMethodInvocation.proceed() line: 172
   => results in TransactionSynchronizationManager.bindResource(HbSessionDataStore, SessionHolder) => as key the Teneo SessionFactory is used
   

2. defaultAutoCommit is set to false to ensure that Spring has full control over the transaction and that the connection pool is not committing statements automatically based on it’s own strategies.
3. The example uses an extended version of the org.eclipse.emf.teneo.hibernate.HbSessionDataStore class that allows the usage of a DataSource object and that configures Teneo to not alter the table, column names but let’s Hibernate handle this via its ImprovedNamingStrategy.
4. hibernate.transaction.auto_close_session is set to false to avoid “SessionException: Session is closed!” in conjunction with the OpenSessionInViewListener.
5. hibernate.current_session_context_class and hibernate.transaction.factory_class are set to special Spring implementations to avoid “org.hibernate.HibernateException: No CurrentSessionContext configured!” when not using Spring Hibernate Template via HibernateDAOSupport. It is not recommended to use the Hibernate Template anymore, see http://blog.springsource.com/2007/06/26/so-should-you-still-use-springs-hibernatetemplate-andor-jpatemplate/

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EPropertyModel

If you are working with EMF (Eclipse Modeling Framework) generated model classes you can also use PropertyModels to bind structural features (properties in EMF terminology) of an EObject to a Wicket component. E.g. if your EObject has an attribute called “comment” you could instantiate a model like this

IModel model = new PropertyModel(myEObject, "comment");

This approach has several disadvantages. First, the name of the attribute is declared as a String and not as a compile-time reference to the actual attribute. This means the application could break during runtime if you have renamed the attribute at one point and forgot to also change the String value. Second, this property model uses runtime reflection which is a slow alternative to compile time based access.
Java classes generated from EMF Models by default extend the EObject class which provides a compile-time reflection API. Using the generic eGet and eSet methods any public property of the EObject can be accessed. The EMF Generator also generates a Package class for each EMF package that holds a Literals interface listing all available attributes and references of all generated EClasses of the given package. If you lets say have an EClass “Ticket” with the attribute “comment” in the package “com.acme.service” you could utilize the compile time reflection API as follows:

EAttribute commentAttribute = com.acme.service.ServicePackage.Literals.TICKET__COMMENT;
Ticket newTicket = com.acme.service.ServiceFactory.eINSTANCE.create(Ticket.class);
newTicket.eSet(commentAttribute, "my comment");

Using the EMF compile-time reflection API I created a generic EMF ECore Feature Model implementation that leverages the compile-time references to structural features. Most of the code is actually related to working around the fact that EAttributes and EReferences are not serializable but which they should to be part safely referenced in a model that potentially is serialized by Wicket between requests.

import org.apache.wicket.model.IDetachable;
import org.apache.wicket.model.IObjectClassAwareModel;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EClassifier;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EPackage;
import org.eclipse.emf.ecore.EStructuralFeature;

/**
 * A property model to bind an attribute of an EMF ECore object
 *
 * @author Sebastian Thomschke
 */
@SuppressWarnings("unchecked")
public class EFeatureModel<T> implements IObjectClassAwareModel<T>
{
	private static final long serialVersionUID = 1L;

	private transient EStructuralFeature feat;
	private String featContainerClassName;
	private String featName;
	private String featPackageNsURI;

	private EObject target;

	public EFeatureModel(EObject target, EStructuralFeature efeature)
	{
		this.target = target;
		this.feat = efeature;
		this.featName = efeature.getName();
		this.featContainerClassName = efeature.getContainerClass().getName();
		this.featPackageNsURI = ((EPackage) efeature.eContainer().eContainer()).getNsURI();
	}

	public void detach()
	{
		if (target instanceof IDetachable) ((IDetachable) target).detach();
	}

	public EStructuralFeature getFeature()
	{
		if (feat == null)
		{
			EPackage ePackage = EPackage.Registry.INSTANCE.getEPackage(featPackageNsURI);
			for (Object eClassifierItem : ePackage.getEClassifiers())
			{
				EClassifier eClassifier = (EClassifier) eClassifierItem;
				if (eClassifier.getInstanceClass().getName().equals(featContainerClassName))
					feat = ((EClass) eClassifier).getEStructuralFeature(featName);
			}
		}
		return feat;
	}

	public T getObject()
	{
		return (T) target.eGet(getFeature());
	}

	public Class<T> getObjectClass()
	{
		return getFeature().getEType().getInstanceClass();
	}

	public void setObject(T object)
	{
		// do nothing if the object is the same instance that is returned by the getter
		// this is esp. important for collection properties
		if (target.eGet(getFeature()) == object) return;

		target.eSet(getFeature(), object);
	}

	@Override
	public String toString()
	{
		return new StringBuilder("Model:classname=[").append(getClass().getName()).append("]").append(":target=[")
				.append(target).append("]").toString();
	}
}

Using this new model implementation is as simple as using the PropertyModel provided by Wicket:

IModel model = new EFeatureModel(myTicket, com.acme.service.ServicePackage.Literals.TICKET__COMMENT);

You can now fully enjoy the compile-time safeness of your EMF model.

Making EObjects serializable

Wicket usually serializes components and their associated models between HTTP requests. If you are using the provided EPropertyModel your EObject classes must implement the Serializable interface. To achieve this, simply extend the EObject interface with the Serializables interface and set “Root Extends Interface” property in your genmodel configuration to this interface.

/**
 * @author Sebastian Thomschke
 */
public interface SerializableEObject extends EObject, Serializable {
}

When you now regenerate the model classes they will extend the SerializableEObject interface and Wicket will stop complaining about objects in the model being not serializable.

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Post tags: eclipse, ecore, emf, Java, reflection, wicket

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Installing Sun Java 6

Ensure the non-free section is enabled for the APT repository configuration in /etc/apt/sources.list, e.g. “deb http://ftp.de.debian.org/debian testing main contrib non-free”

apt-get update
apt-get install sun-java6-jdk
echo 'JAVA_HOME="/usr/lib/jvm/java-6-sun"' >> /etc/environment
echo 'JRE_HOME="/usr/lib/jvm/java-6-sun/jre"' >> /etc/environment

Installing Tomcat 6

apt-get install tomcat6 tomcat6-admin
/etc/init.d/tomcat6 stop

Creating standard Tomcat directory layout

mkdir /opt/tomcat
cd /opt/tomcat
ln -s /etc/tomcat6/ conf
ln -s /usr/share/tomcat6/bin/ bin
ln -s /usr/share/tomcat6/lib/ lib
ln -s /var/lib/tomcat6/webapps webapps
ln -s /var/log/tomcat6/ logs

Creating a Tomcat admin user

In /opt/tomcat/conf/tomcat-users.xml add an entry like:

<user name="ADMIN_USERNAME" password="ADMIN_PASSWORD" roles="admin,manager" />

Setting up virtual hosts

For each virtual host execute the following command. Replace “mydomain.com” with the desired virtual host name, but omit the “www.” part.

mkdir -p /opt/tomcat/webapps.mydomain.com/ROOT

In the <Engine> tag of “/opt/tomcat/conf/server.xml” add one host entry for each virtual host.

<Host name="mydomain.com" appBase="/opt/tomcat/webapps.mydomain.com">
    <Alias>www.mydomain.com>/Alias>
    <Valve className="org.apache.catalina.valves.AccessLogValve" prefix="mydomain_access_log." suffix=".txt" pattern="common"/>
</Host>

The <Alias> tag tells Tomcat to redirect from www.mydomain.com to mydomain.com.
The <Valve> tag enables access logging in the standard logging format.

Using xinetd to configure port 80 for Tomcat

Binding a service on port 80 requires root permissions. Thus we use port forwarding to “bind” Tomcat to port 80. My VPS does not support the use of “iptables -j REDIRECT” therefore I am using xinetd as a web proxy.
Ensure that no other service is listening on port 80/443:

netstat -pan | grep ":80\|:443"

Register the required xinetd services:

echo echo "
service www
{
        socket_type     = stream
        protocol        = tcp
        user            = root
        wait            = no
        bind            = 88.80.198.181
        port            = 80
        redirect        = localhost 8080
        disable         = no
        flags           = REUSE
        log_type        = FILE /var/log/wwwaccess.log
        log_on_success  -= PID HOST DURATION EXIT

        per_source      = UNLIMITED
        instances       = UNLIMITED
}

service https
{
        socket_type     = stream
        protocol        = tcp
        user            = root
        wait            = no
        bind            = 88.80.198.181
        port            = 443
        redirect        = localhost 8443
        disable         = no
        flags           = REUSE
        log_type        = FILE /var/log/httpsaccess.log
        log_on_success  -= PID HOST DURATION EXIT

        per_source      = UNLIMITED
        instances       = UNLIMITED
}
" > /etc/init.d/tomcat
/etc/init.d/xinetd restart

If you want to use a different service name, e.g. “tomcat” instead of “www” you must add this service to /var/services, e.g. “tomcat 80/tcp”
In /opt/tomcat/conf/server.xml modify the <Connector> as follows:

<Connector port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" proxyPort="80" address="127.0.0.1" />

This binds Tomcat to localhost. It also tells Tomcat that port 80 is the proxy port which is necessary for correct URL generation.
From now on the Tomcat admin applications are only accessible via localhost. You can use SSH port forwarding to still access the applications from your workstation’s web browser. E.g. if you are using PuTTY you can use this command line option “-L 8080:localhost:8080″ to forward the server’s local 8080 port to your workstation’s local 8080 port. On your workstation’s browser you then simply enter http://localhost:8080/manager/html and are connected to the server’s Tomcat admin application.

Enabling PHP support (optional)

Download Quercus.

mkdir -p /opt/downloads
wget -o /opt/downloads/quercus-4.0.3.war http://caucho.com/download/quercus-4.0.3.war

Install Quercus as a shared library.

unzip -j /opt/downloads/quercus-4.0.3.war \*.jar -d /opt/tomcat/lib

Enable PHP support for the virtual hosts by installing the quercus web.xml. For each virtual host execute:

unzip /opt/downloads/quercus-4.0.3.war *web.xml -d /opt/tomcat/webapps.mydomain.com/ROOT

Starting Tomcat

/etc/init.d/tomcat start

References

• Securing Linux for Java services: The port dilemma
• Redirect HTTP and HTTPS traffic to Tomcat’s ports
• Tomcat 6: Virtual Hosting How To
• Tomcat 6: Classloader How To
• Virtual Hosting with Tomcat
• Quercus: Tomcat
• How to install Tomcat 6 on Ubuntu 9.04 (Jaunty)

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Post tags: Java, PHP, port 80, port forwarding, quercus, tomcat, vhost, virtual servers, VPS, xinetd

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By default, PyDev has no problems in presenting you the possible object attributes and methods on a variable if that variable gets a new object instance assigned directly in the code.

For example, when you first type …

mybook = Book()

… and in the next line you enter …

mybook.

… PyDev will dutifully present you the statically declared features for the Book class in a popup.

If you however get that Book instance as the result of another method, e.g. …

mybook = bookstore.findBook("foobar")

… PyDev currently seems to be helpless.

Because of Python’s dynamic nature it is of course a bit harder for an IDE to figure out what kind of objects may a method. But PyDev could for example honor the @return / @rtype PyDoc annotations (which you can add to the findBook’s method declaration) but currently it just does not.

To still have autocompletion you have two options:

1. Temporarily instantiate a Book object in the code.

   mybook = Book()
   mybook = bookstore.findBook("foobar")
   mybook. #--> now you have auto completion
   

   This has the drawback, that if you forget to remove the first line before you finish coding an unneccessary Book instance will be created on every execution during runtime.

2. Use an assertion to ensure that the mybook variable contains an object of type Book

   mybook = bookstore.findBook("foobar")
   assert isinstance(mybook, Book)
   mybook. #--> now you have auto completion
   

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Post tags: Jython, pydev, pydoc, python, rtype

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1. Enabling/disabling constraints based on the object state:
Using the newly introduced when attribute for constraints it is possible to specify under which circumstances the constraint will be considered during object validation. The when attribute holds a formula in one of the supported scripting languages. If the formula returns true, the constraint will be activated for the current validation cycle otherwise it is ignored. In the following example the alias attribute must have a value only when the name attribute is not set.

public class User {
   private String name;

   @NotNull(when = "groovy:_this.name == null")
   private String alias;

   // . . .
}

2. Fine grain control over how constraints are applied on arrays, maps, collections and their elements
The newly introduced attribute appliesTo allows you to specify if and how a constraint declared for a map, a collection or an array is applied to their elements as well or exclusively. See the following example how this works:

public class BusinessObject {

   // the ids field may be null, but if it is not null
   // none of it's items must be null
   @NotNull(appliesTo = { ConstraintTarget.VALUES })
   private String[] ids;

   // only the field itself must not be null,
   // the list can contain null values
   @NotNull(appliesTo = { ConstraintTarget.CONTAINER })
   private List items;

   // the field must not be null as well as all keys
   // and values of the map
   @NotNull(appliesTo = { ConstraintTarget.CONTAINER, ConstraintTarget.KEYS, ConstraintTarget.VALUES })
   private Map itemsByGroup;

   // . . .
}

Download
You can get the lates binaries and source files of OVal from here: http://sourceforge.net/projects/oval/files/

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import re

def cmpver(vA, vB):
    """
    Compares two version number strings
    @param vA: first version string to compare
    @param vB: second version string to compare
    @author Sebastian Thomschke
    @return negative if vA < vB, zero if vA == vB, positive if vA > vB.

    Examples:
    >>> cmpver("0", "1")
    -1
    >>> cmpver("1", "0")
    1
    >>> cmpver("1", "1")
    0
    >>> cmpver("1.0", "1.0")
    0
    >>> cmpver("1.0", "1")
    0
    >>> cmpver("1", "1.0")
    0
    >>> cmpver("1.1.0", "1.0.1")
    1
    >>> cmpver("1.0.1", "1.1.1")
    -1
    >>> cmpver("0.3-SNAPSHOT", "0.3")
    -1
    >>> cmpver("0.3", "0.3-SNAPSHOT")
    1
    >>> cmpver("1.3b", "1.3c")
    -1
    >>> cmpver("1.14b", "1.3c")
    1
    """
    if vA == vB: return 0

    def num(s):
        if s.isdigit(): return int(s)
        return s

    seqA = map(num, re.findall('\d+|\w+', vA.replace('-SNAPSHOT', '')))
    seqB = map(num, re.findall('\d+|\w+', vB.replace('-SNAPSHOT', '')))

    # this is to ensure that 1.0 == 1.0.0 in cmp(..)
    lenA, lenB = len(seqA), len(seqB)
    for i in range(lenA, lenB): seqA += (0,)
    for i in range(lenB, lenA): seqB += (0,)

    rc = cmp(seqA, seqB)

    if rc == 0:
        if vA.endswith('-SNAPSHOT'): return -1
        if vB.endswith('-SNAPSHOT'): return 1
    return rc

Theoretically lines 43 – 49 could be written in a more compact way but using the short circuit evaluations (as below) lead to wrong results – at least in Jython 2.1:

    seqa = map(lambda s: s.isdigit() and int(s) or s, re.findall('\d+|\w+', vA.replace('-SNAPSHOT', '')))
    seqb = map(lambda s: s.isdigit() and int(s) or s, re.findall('\d+|\w+', vB.replace('-SNAPSHOT', '')))

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@echo off
set JPDA_TRANSPORT="dt_socket"
set JPDA_ADDRESS="8000"
set JPDA_SUSPEND="y"
catalina.bat jpda start

Simply create a debug.bat file in TomCat’s bin directory and add these lines.

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For anyone who is interested, that is what we came up to put the initial user id into a variable named ${LOGIN_USER}

LOGIN_USER=`who -m`; LOGIN_USER=${LOGIN_USER%% *}

or alternatively

LOGIN_USER=`who -m | cut -d' ' -f1`

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Post tags: bash, Linux, username

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Da ich nun bereits bei meinem zweiten Kunden “gezwungen” bin, mit MS Outlook 2003 zu arbeiten und mich scheinbar auch in Zukunft nicht um dessen Verwendung drücken kann, habe ich zwei der vielen praktische Notes-Funktionen für Outlook 2003 implementiert:

1. Die Schaltfläche [Send only], bzw. [Nur senden] versendet eine E-Mail ohne eine Kopie davon in Outlook zu speichern.
2. Die Schaltfläche [Send and File...] bzw. [Senden und ablegen...] erfragt vor dem Versenden in welchem Ordner die gerade geschriebene E-Mail abgelegt werden soll.

Installation:

1. Download des Visual Basic Moduls in der gewünschten Sprache.
   Note: There is a file embedded within this post, please visit this post to download the file.

   Note: There is a file embedded within this post, please visit this post to download the file.
   

2. In Outlook den Visual Basic Editor öffnen.

   

3. Das Visual Basic Modul importieren

   

4. Das Projekt speichern.

   

5. Die Schaltflächen in der Toolbar installieren.

   

6. Beim Erstellen einer neuen E-Mail sollten nun in der Toolbar die beiden zusätzlichen Schaltflächen angezeigt werden.

   

7. Beim Klick auf “Senden und ablegen…” erscheint vor dem Versenden der Ordnerdialog.

   

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Post tags: Outlook, Productivity, VBA, Visual Basic

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Im folgenden ein passendes Modul, welches diese Funktionalität bereitstellt. Es verwendet einen Mechanismus um die Passworteingabe in der Kommandozeile zu maskieren, welcher hier beschrieben wurde http://java.sun.com/developer/technicalArticles/Security/pwordmask/. Sollte Jython in Verbindung mit Java 6 oder höher eingesetzt werden, so nutzt dieses Modul stattdessen die neue Console.readPassword() Methode. Sollte das Modul in einer Umgebung laufen in welcher eine getpass Modulimplementierung verfügbar ist, dann wird stattdessen an die entsprechende Methode im getpass Modul delegiert.

# ext_getpass.py
# @author Sebastian Thomschke, http://sebthom.de/
import thread, sys, time, os

# exposed methods:
__all__ = ["getpass","getuser"]

def __doMasking(stream):
    __doMasking.stop = 0
    while not __doMasking.stop:
        stream.write("b*")
        stream.flush()
        time.sleep(0.01)

def generic_getpass(prompt="Password: ", stream=None):
    if not stream:
        stream = sys.stderr
    prompt = str(prompt)
    if prompt:
        stream.write(prompt)
        stream.flush()
    thread.start_new_thread(__doMasking, (stream,))
    password = raw_input()
    __doMasking.stop = 1
    return password

def generic_getuser():
    for name in ('LOGNAME', 'USER', 'LNAME', 'USERNAME'):
        usr = os.environ.get(name)
        if usr: return usr

def java6_getpass(prompt="Password: ", stream=None):
    if not stream:
        stream = sys.stderr
    prompt = str(prompt)
    if prompt:
        stream.write(prompt)
        stream.flush()

    from java.lang import System
    console = System.console()
    if console == None:
	    return generic_getpass(prompt, stream)
    else:
        return "".join(console.readPassword())

try:
    # trying to use Python's getpass implementation
    import getpass
    getpass = getpass.getpass
    getuser = getpass.getuser
except ImportError, e:
    getuser = generic_getuser

    # trying to use Java 6's Console.readPassword() implementation
    try:
        from java.io import Console
        getpass = java6_getpass
    except ImportError, e:
        # use the generic getpass implementation
        getpass = generic_getpass

Here is an usage example:

import ext_getpass as getpass

pw = getpass.getpass("Please enter your password:")
print "The entered password was: " + pw

© sebthom for sebthom.de, 2008. | Permalink | One comment | Add to del.icio.us
Post tags: Java, Jython, password, python

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Both options, installing WP standalone and federating it into a cell afterwards as well as installing it on an already managed node have different pros and cons each. In WP 6.0 the installation onto a managed node was even mandatory to enable WebSphere Process Server integration.

Surprisingly WP6.1.0.0 does not support the installation on a managed node anymore. All nodes of a cluster need to be installed as standalone systems first and then be federated into a WebSphere cell.

For WP 6.0 the installation procedure is described here. The 6.1 info center does not mention this procedure anymore and it no, it was not dropped accidentally.

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Post tags: deployment, limitation, websphere portal

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$wp_taxonomies['category'] = (object) array('name' => 'category', 'object_type' => 'post', 'hierarchical' => true, 'update_count_callback' => '_update_post_term_count');
$wp_taxonomies['post_tag'] = (object) array('name' => 'post_tag', 'object_type' => 'post', 'hierarchical' => false, 'update_count_callback' => '_update_post_term_count');
$wp_taxonomies['link_category'] = (object) array('name' => 'link_category', 'object_type' => 'link', 'hierarchical' => false);

Da weder Fehlermeldungen im Browser noch in den Log Dateien erscheinen habe ich leider keine Idee wieso diese Casts zum Abbruch der Skriptausführung führen. Die installierte PHP Version entspricht der aktuellen stabilen 5.x Version und sollte daher eigentlich nicht die Ursache des Problems sein.
Um das Problem zu umgehen habe ich eine Methode eingeführt die ebenfalls Arrays in Objekte transformieren kann, welche jedoch nicht auf der PHP Objekt Casting Funktion beruht.

function arr2obj($arr) {
	foreach ($arr as $k => $v) $obj -> {$k} = $v;
	return $obj;
}

$wp_taxonomies['category'] = arr2obj(array('name' => 'category', 'object_type' => 'post', 'hierarchical' => true, 'update_count_callback' => '_update_post_term_count'));
$wp_taxonomies['post_tag'] = arr2obj(array('name' => 'post_tag', 'object_type' => 'post', 'hierarchical' => false, 'update_count_callback' => '_update_post_term_count'));
$wp_taxonomies['link_category'] = arr2obj(array('name' => 'link_category', 'object_type' => 'link', 'hierarchical' => false));

© sebthom for sebthom.de, 2008. | Permalink | 2 comments | Add to del.icio.us
Post tags: bug, PHP, Wordpress, workaround

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[INFO] [compiler:compile]
[INFO] Compiling 180 source files to C:\projects\oval\src\trunk\target\classes
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Compilation failure
C:\projects\oval\src\trunk\src\main\java\net\sf\oval\Validator.java:[373,58]
addMethodParameterChecks(java.lang.reflect.Method,int,java.lang.Object)
has private access in net.sf.oval.internal.ClassChecks 

There exist multiple methods named addMethodParameterChecks in the class ClassChecks with different signatures. The problem is that javac tries to link against the wrong method when compiling the class calling one of the methods.

(...)
Read the rest of Sun JDK5/6 compilers broken when linking overloaded methods with variable arguments (284 words)

© sebthom for sebthom.de, 2008. | Permalink | One comment | Add to del.icio.us
Post tags: bug, compiler, Java, jdk

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Ich verwende das DD Sitemap Generator Plug-in für WordPress zur automatischen Erzeugung einer Sitemap basierend auf den Beiträge und Kategorien meines Blogs. Auf dieser generierten Sitemap werden jedoch bei den Kategorienamen und Beitragstiteln die Übersetzungen in allen Sprachen auf einmal angezeigt inklusive der speziellen Tags.

Um dies zu beheben habe ich mich etwas im Code von WordPress und dem Language Switcher Plug-in umgesehen. Das Language Switcher Plug-in entfernt die Tags und überflüssigen Übersetzungen indem es sich der Filters API bedient – eine Art ereignisbasierter RückrufmMechanismus. Plug-ins können Ihr Interesse in bestimmten Textfilterereignissen signalisieren indem sie die Funktion add_filter(the_event_id, the_name_of_a_function_to_callback) unter Angabe der ID eines Filterereignisses und des Namens der aufzurufenden Funktion im Falle des Auftretens des entsprechenden Ereignis. Neben dem Registrieren für Filterereignisse können Plug-ins auch selbst solche Textfilterereignisse auslösen indem sie Funktion apply_filters(the_event_id, the_text_to_be_filtered) unter Angabe einer ID des Filterereignisses und des zu filternden Textes aufrufen. WordPress führt dann alle für dieses Ereignis registrier Filtermethoden auf dem übergebenen Text aus und die apply_filters Funktion gibt als Ergebnis den “gefilterten” text zurück. Wenn WordPress beispielsweise die Titel von Beiträgen oder Seiten darstellt löst es ein Filterereignis mit der ID “the_title” aus. Dies ermöglicht Plug-ins den Titel zu prozessieren/modifizieren bevor er dargestellt wird. Das Language Switcher Plug-in registriert sich daher selbst für dieses und eine Reihe anderer Filterereignisse um mehrsprachig eingegebene Texte vor der Darstellung um die Sprachtags und die nicht relevanten Übersetzungen zu entfernen.

Leider löst das DD Sitemap Generator Plug-in die entsprechenden Filterereignisse bei der Erstellung der Sitemap nicht aus. Daher ist auch das Language Switcher Plug-in nicht in der Lage die Kategorienamen und Beitragstitel zu bearbeiten.

Um das Problem zu lösen habe ich daher den Quellcode des DD Sitemap Generator Plug-in analysiert und die fehlenden apply_filters Aufrufe an den entsprechenden Stellen hinzugefügt. Wer ebenfalls von diesem Problem betroffen ist kann sich wie folgt behelfen:

1. Die Datei <wordpress_root>/wp-content/plugins/sitemap-generator/sitemap-generator.php (oder <wordpress_root>/wp-content/plugins/dd-sitemap-gen/dd-sitemap-gen.php) in einem Editor öffnen
2. Den folgenden Text lokalisieren
      $tmp_array['title'] = $pages[$k]->post_title;
   und ersetzen durch
      $tmp_array['title'] = apply_filters(‘the_title’, $pages[$k]->post_title);
3. Den folgenden Text lokalisieren
      $tmp_array['title'] = $cat_data[$c]['cat_name'];
   und ersetzen durch
      $tmp_array['title'] = apply_filters(‘the_category’, $cat_data[$c]['cat_name']);
4. Den folgenden Text lokalisieren
      $tmp_array['title'] = $posts[$k]->post_title;
   und ersetzen durch
      $tmp_array['title'] = apply_filters(‘the_title’, $posts[$k]->post_title);
5. Die Änderungen speichern. Das sollte es gewesen sein.

Mit diesem Verfahren kann man auch andere Plug-ins für ein gutes Zusammenspiel mit dem Language Switcher Plug-in korrigieren.

© sebthom for sebthom.de, 2008. | Permalink | 3 comments | Add to del.icio.us
Post tags: PHP, Wordpress, workaround

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Lange Rede, kurzer Sinn, ich bin schließlich auf den PHP Bug Report #42739 mkdir doesn’t like a trailing slash when safe_mode is enabled gestossen und es zeigte sich, daß dies genau das Problem war, welches sich mir auf meinem Hosting Account entgegenstellte. Die PHP Option safe_mode ist dort aktiviert und WordPress versucht vergeblich mit Schrägstrich endende Verzeichnissepfade anzulegen (z.B. /htdocs/wp-content/upgrade/the-plugin/).

Nachdem mir der Grund also bekannt war, konnte ich einen Workaround entwickeln und endlich den on-click plug-in updater nutzen. Für alle die das gleiche Problem haben, hier meine Lösung:

1. Die Datei <wp_root>/wp_admin/includes/class-wp-filesystem-direct.php lokalisieren und in einem Editor öffnen
2. Nach “function mkdir” in der Datei suchen
3. Die nachfolgenden Codezeilen in die Methode einfügen. 

   function mkdir($path,$chmod=false,$chown=false,$chgrp=false){
   	if( ! $chmod)
   		$chmod = $this->permission;
   
   	// workaround for http://bugs.php.net/bug.php?id=42739 starts here
   	if(ini_get('safe_mode') && substr($path, -1) == '/')
   	{
   		$path = substr($path, 0, -1);
   	}
   	// workaround for http://bugs.php.net/bug.php?id=42739 ends here
   
   	if( !@mkdir($path,$chmod) )
   		return false;
   	if( $chown )
   		$this->chown($path,$chown);
   	if( $chgrp )
   		$this->chgrp($path,$chgrp);
   	return true;
   }

4. Mit der Ein-Klick-Aktualisierung beginnen!

Nachtrag:

1. Die Änderung funktioniert auch mit WordPress 2.5.1
2. Falls diese Änderung nicht zum gewünschten Erfolg führen, kann der Fehler noch eine zweite Ursache haben. Daher sollten die Berechtigungen des Verzeichnis /wp-content/upgrade/ und dessen Unterverzeichnisse überprüft und gegebenenfalls per chmod auf 777 gesetzt werden. Falls das upgrade Verzeichnis gar nicht existieren sollte, reicht es vielleicht schon dieses einfach manuell anzulegen.

Nachtrag 2:

1. Falls sich das Problem weiter besteht sollte geprüft werden ob das Plug-in AskApache Password Protect installiert ist.
2. Wenn ja, kann es helfen dieses vor dem Aktualisieren anderer Plug-ins zu deaktivieren.

© sebthom for sebthom.de, 2008. | Permalink | 37 comments | Add to del.icio.us
Post tags: bug, PHP, Wordpress, workaround

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Auf der Suche nach möglichen Programmen die diesen Prozess vereinfachen könnten bin ich auf die Software myPodder gestossen. Diese wird kostenlos von Podcast Ready bereitgestellt. Podcasts Ready stellt einen Onlinekatalog verfügbarer Podcasts unterschiedlichster Quellen bereit und zu meiner Überraschung waren auch die Podcasts des Deutschlandfunks aufgeführt. Das interessante an ihrer Software ist die Tatsache, daß sie sich direkt auf Audioplayern installieren läßt und man diese so konfigurieren kann, daß sie beim Anschliessen des Players an einen Computer automatisch startet. Somit kann man auf einfachste und sehr komfortable Weise über quasi jeden internetfähigen Computer seinen Player mit neuen Podcasts bestücken.(...)
Read the rest of myPodder – ein mobiler Podcatcher (0 words)

© sebthom for sebthom.de, 2008. | Permalink | One comment | Add to del.icio.us
Post tags: audio, PHP, podcasts

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(...)
Read the rest of Meine favorisierten WordPress Plugins & Ressourcen (717 words)

© sebthom for sebthom.de, 2007. | Permalink | 3 comments | Add to del.icio.us
Post tags: audio, MP3, PHP, Wordpress

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Projektseite: http://sourceforge.net/projects/oval/

© sebthom for sebthom.de, 2007. | Permalink | No comment | Add to del.icio.us
Post tags: Java, oval

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