2 Источника и 1 Transaction Manager

Java: JDK 7_60 , Spring v4, Hibernate v4, Spring-LDAP v2

Проблема: При работе с 2-мя источниками, проблема с управлением транзакциями.

Решение:

<bean id="jpaUnderLdapTransactionManager" class="org.springframework.ldap.transaction.compensating.manager.ContextSourceAndJpaTransactionManager">
    <property name="contextSource" ref="ldapSimpleContextSource"/>
    <property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>

<tx:annotation-driven transaction-manager="jpaUnderLdapTransactionManager"/>




Class ContextSourceAndJpaTransactionManager

public class ContextSourceAndJpaTransactionManager extends JpaTransactionManager
{

private static final long serialVersionUID = 1L;

private ContextSourceTransactionManagerDelegate ldapManagerDelegate =
        new ContextSourceTransactionManagerDelegate();

/**
 * @see org.springframework.orm.jpa.JpaTransactionManager#isExistingTransaction(Object)
 */
protected boolean isExistingTransaction(Object transaction)
{
    ContextSourceAndJpaTransactionObject actualTransactionObject =
            (ContextSourceAndJpaTransactionObject) transaction;

    return super.isExistingTransaction(actualTransactionObject
                                               .getJpaTransactionObject());
}

/**
 * @see org.springframework.orm.jpa.JpaTransactionManager#doGetTransaction()
 */
protected Object doGetTransaction() throws TransactionException
{
    Object dataSourceTransactionObject = super.doGetTransaction();
    Object contextSourceTransactionObject =
            ldapManagerDelegate.doGetTransaction();

    return new ContextSourceAndJpaTransactionObject(
            contextSourceTransactionObject, dataSourceTransactionObject
    );
}

/**
 * @see org.springframework.orm.jpa.JpaTransactionManager#doBegin(java.lang.Object,
 *      org.springframework.transaction.TransactionDefinition)
 */
protected void doBegin(Object transaction, TransactionDefinition definition)
        throws TransactionException
{
    ContextSourceAndJpaTransactionObject actualTransactionObject =
            (ContextSourceAndJpaTransactionObject) transaction;

    super.doBegin(actualTransactionObject.getJpaTransactionObject(),
                  definition);
    ldapManagerDelegate.doBegin(
            actualTransactionObject.getLdapTransactionObject(),
            definition
    );
}

/**
 * @see org.springframework.orm.jpa.JpaTransactionManager#doCleanupAfterCompletion(java.lang.Object)
 */
protected void doCleanupAfterCompletion(Object transaction)
{
    ContextSourceAndJpaTransactionObject actualTransactionObject =
            (ContextSourceAndJpaTransactionObject) transaction;

    super.doCleanupAfterCompletion(actualTransactionObject
                                           .getJpaTransactionObject());
    ldapManagerDelegate.doCleanupAfterCompletion(actualTransactionObject
                                                 .getLdapTransactionObject());
}

/**
 * @see org.springframework.orm.jpa.JpaTransactionManager#doCommit(org.springframework.transaction.support.DefaultTransactionStatus)
 */
protected void doCommit(DefaultTransactionStatus status)
        throws TransactionException
{

    ContextSourceAndJpaTransactionObject actualTransactionObject =
            (ContextSourceAndJpaTransactionObject) status.getTransaction();

    try
    {
        super.doCommit(new DefaultTransactionStatus(
                actualTransactionObject.getJpaTransactionObject(),
                status.isNewTransaction(),
                status.isNewSynchronization(),
                status.isReadOnly(),
                status.isDebug(),
                status.getSuspendedResources())
        );
    }
    catch (TransactionException ex)
    {
        if (isRollbackOnCommitFailure())
        {
            logger.debug("Failed to commit db resource, rethrowing", ex);
            // If we are to rollback on commit failure, just rethrow the
            // exception - this will cause a rollback to be performed on
            // both resources.
            throw ex;
        }
        else
        {
            logger.warn(
                    "Failed to commit and resource is rollbackOnCommit not set -"
                            + " proceeding to commit ldap resource.");
        }
    }
    ldapManagerDelegate.doCommit(new DefaultTransactionStatus(
            actualTransactionObject.getLdapTransactionObject(),
            status.isNewTransaction(),
            status.isNewSynchronization(),
            status.isReadOnly(),
            status.isDebug(),
            status.getSuspendedResources())
    );
}

/**
 * @see org.springframework.orm.jpa.JpaTransactionManager#doRollback(org.springframework.transaction.support.DefaultTransactionStatus)
 */
protected void doRollback(DefaultTransactionStatus status) throws TransactionException
{
    ContextSourceAndJpaTransactionObject actualTransactionObject =
            (ContextSourceAndJpaTransactionObject) status.getTransaction();

    super.doRollback(new DefaultTransactionStatus(
            actualTransactionObject.getJpaTransactionObject(),
            status.isNewTransaction(),
            status.isNewSynchronization(),
            status.isReadOnly(),
            status.isDebug(),
            status.getSuspendedResources())
    );
    ldapManagerDelegate.doRollback(new DefaultTransactionStatus(
            actualTransactionObject.getLdapTransactionObject(),
            status.isNewTransaction(),
            status.isNewSynchronization(),
            status.isReadOnly(),
            status.isDebug(),
            status.getSuspendedResources())
    );
}

@SuppressWarnings("UnusedDeclaration")
public ContextSource getContextSource()
{
    return ldapManagerDelegate.getContextSource();
}

public void setContextSource(ContextSource contextSource)
{
    ldapManagerDelegate.setContextSource(contextSource);
}

@SuppressWarnings("UnusedDeclaration")
protected void setRenamingStrategy(TempEntryRenamingStrategy renamingStrategy)
{
    ldapManagerDelegate.setRenamingStrategy(renamingStrategy);
}

private final static class ContextSourceAndJpaTransactionObject
{
    private Object ldapTransactionObject;

    private Object jpaTransactionObject;

    public ContextSourceAndJpaTransactionObject(
            Object ldapTransactionObject, Object jpaTransactionObject)
    {
        this.ldapTransactionObject = ldapTransactionObject;
        this.jpaTransactionObject = jpaTransactionObject;
    }

    public Object getJpaTransactionObject()
    {
        return jpaTransactionObject;
    }

    public Object getLdapTransactionObject()
    {
        return ldapTransactionObject;
    }
}

/**
 * @see org.springframework.orm.jpa.JpaTransactionManager#doSuspend(java.lang.Object)
 */
protected Object doSuspend(Object transaction) throws TransactionException
{
    throw new TransactionSuspensionNotSupportedException(
            "Transaction manager [" + getClass().getName()
                    + "] does not support transaction suspension");
}

/**
 * @see org.springframework.orm.jpa.JpaTransactionManager#doResume(java.lang.Object, java.lang.Object)
 */
protected void doResume(Object transaction, Object suspendedResources)
        throws TransactionException
{
    throw new TransactionSuspensionNotSupportedException(
            "Transaction manager [" + getClass().getName()
                    + "] does not support transaction suspension");
}

/**
 * @see org.springframework.orm.jpa.JpaTransactionManager#doSetRollbackOnly(org.springframework.transaction.support.DefaultTransactionStatus)
 */
@Override
protected void doSetRollbackOnly(DefaultTransactionStatus status)
{
    super.doSetRollbackOnly(
            new DefaultTransactionStatus(
                ((ContextSourceAndJpaTransactionObject)status.getTransaction())
                        .getJpaTransactionObject(),
                status.isNewTransaction(),
                status.isNewSynchronization(),
                status.isReadOnly(),
                status.isDebug(),
                status.getSuspendedResources())

    );
}
}

P.S: На форумах поодержки spring-ldap пишут что использование 2-х транзакций это зло 

Удачи =)
Ссылка на оригинал

Set default use Java in MacOS

• cd /System/Library/Frameworks/JavaVM.framework/Versions/
• sudo rm CurrentJDK
• sudo ln -s /Library/Java/JavaVirtualMachines/jdk1.7.60_jdk/Contents/ CurrentJDK
• java -version

Сайт первоисточник: http://www.monkehworks.com/set-java-7-as-default-jvm-on-mac-osx-mountain-lion

Debug для устройств на основе RockChip RK3066

Столкнулся с тем что устройство на сонове RockChip RK3066, упорно не хочет работать с adb

После поисков в интеренте и эксперементов, нашел решение.

1. Необходимо в домашней директории найти фаил adb_usb.ini (~/.android/adb_usb.ini)
2. После чего добавить в него код вендора, для устройств на RK3066 это 2207, необходимо в конец файла добавить 0x2207
3. После чего делаем adb kill-server и adb devices 

UPDATE: Узнать idVendor  на linux можно командами dmesg | grep usb или lsusb -v | less

Интересный линк: http://stackoverflow.com/questions/7641939/android-fastboot-waiting-for-devices

P.S.: Тестировал данный подход на Mac OS 10.9

Фаил adb_usb.ini  выглядит так:


# ANDROID 3RD PARTY USB VENDOR ID LIST -- DO NOT EDIT. 

# USE 'android update adb' TO GENERATE. 

# 1 USB VENDOR ID PER LINE. 

0x2207

Полезно для настройки JVM

http://www.petefreitag.com/articles/gctuning/

Частота обновления дачиков в Android

Стандартна задержка обновления данных с датчика выставлена на 200000 мс = 20 с.
Этот параметр может меняется, в OS Android есть 4 варианта:

• SENSOR_DELAY_FASTEST = 0 мс;
• SENSOR_DELAY_GAME = 20000 мс  == 20с;
• SENSOR_DELAY_UI = 60000 мс == 60с;
• SENSOR_DELAY_NORMAL = 200000 мс = 200с = 3,33 мин ;

P.S: Начиная с Android 3.0 (API Level 11), вы можете сами выставлять задержку в
миллисекундах.

Оригинальный текст