Examples of org.eclipse.persistence.internal.databaseaccess.Accessor

Package org.eclipse.persistence.internal.databaseaccess

Examples of org.eclipse.persistence.internal.databaseaccess.Accessor

org.eclipse.persistence.internal.databaseaccess.Accessor
INTERNAL: Accessor defines the interface used primarily by the assorted TopLink Sessions to interact with a data store. In "normal" TopLink this data store is a relational database. But this interface also allows developers using the TopLink SDK to develop Accessors to other, non-relational, data stores.
Accessors must implement the following behavior:
- connect to and disconnect from the data store
- handle transaction contexts
- execute calls that read, insert, update, and delete data
- keep track of concurrently executing calls
- supply metadata about the data store
@see org.eclipse.persistence.internal.sessions.AbstractSession @see Call @author Big Country @since TOPLink/Java 3.0

        if (!query.isModifyQuery()) {
            return null;
        }
        List<Accessor> accessors = new ArrayList<Accessor>(this.connectionPools.size());
        for (String poolName : this.connectionPools) {
            Accessor accessor = getAccessor(poolName, session, query, true);
            // Do not replicate to dead connection pools.
            if (accessor != null) {
                accessors.add(accessor);
            }
        }

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    protected void basicBeginTransaction() throws DatabaseException {
        Collection<Accessor> accessors = getAccessors();
        if (accessors == null) {
            return;
    }
        Accessor failedAccessor = null;
        try {
            for (Accessor accessor : accessors) {
                failedAccessor = accessor;
                basicBeginTransaction(accessor);
            }

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                if(unitOfWork.isInTransaction() || unitOfWork.getParent().isExclusiveIsolatedClientSession()) {
                    return (T) unitOfWork.getAccessor().getConnection();
                }
                if (checkForTransaction(false) != null) { 
                    unitOfWork.beginEarlyTransaction();
                    Accessor accessor = unitOfWork.getAccessor();
                    // Ensure external connection is acquired.
                    accessor.incrementCallCount(unitOfWork.getParent());
                    accessor.decrementCallCount();
                    return (T) accessor.getConnection();
                }
                return null;
            } else if (cls.getName().equals("javax.resource.cci.Connection")) {                
                UnitOfWorkImpl unitOfWork = (UnitOfWorkImpl) this.getUnitOfWork();
                if(unitOfWork.isInTransaction() || unitOfWork.getParent().isExclusiveIsolatedClientSession()) {
                    return (T) unitOfWork.getAccessor().getConnection();
                }
                if (checkForTransaction(false) != null) { 
                    unitOfWork.beginEarlyTransaction();
                    Accessor accessor = unitOfWork.getAccessor();
                    // Ensure external connection is acquired.
                    accessor.incrementCallCount(unitOfWork.getParent());
                    accessor.decrementCallCount();
                    return (T) accessor.getDatasourceConnection();
                }
                return null;
            }
            throw new PersistenceException(ExceptionLocalization.buildMessage("Provider-does-not-support-the-call", null));

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    protected void basicBeginTransaction() throws DatabaseException {
        Collection<Accessor> accessors = getAccessors();
        if (accessors == null) {
            return;
    }
        Accessor failedAccessor = null;
        try {
            for (Accessor accessor : accessors) {
                failedAccessor = accessor;
                basicBeginTransaction(accessor);
            }

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                if(unitOfWork.isInTransaction() || unitOfWork.getParent().isExclusiveIsolatedClientSession()) {
                    return (T) unitOfWork.getAccessor().getConnection();
                }
                if (checkForTransaction(false) != null) { 
                    unitOfWork.beginEarlyTransaction();
                    Accessor accessor = unitOfWork.getAccessor();
                    // Ensure external connection is acquired.
                    accessor.incrementCallCount(unitOfWork.getParent());
                    accessor.decrementCallCount();
                    return (T) accessor.getConnection();
                }
                return null;
            }
            throw new PersistenceException(ExceptionLocalization.buildMessage("Provider-does-not-support-the-call", null));

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                if(unitOfWork.isInTransaction() || unitOfWork.getParent().isExclusiveIsolatedClientSession()) {
                    return (T) unitOfWork.getAccessor().getConnection();
                }
                if (checkForTransaction(false) != null) { 
                    unitOfWork.beginEarlyTransaction();
                    Accessor accessor = unitOfWork.getAccessor();
                    // Ensure external connection is acquired.
                    accessor.incrementCallCount(unitOfWork.getParent());
                    accessor.decrementCallCount();
                    return (T) accessor.getConnection();
                }
                return null;
            } else if (cls.getName().equals("javax.resource.cci.Connection")) {                
                UnitOfWorkImpl unitOfWork = (UnitOfWorkImpl) this.getUnitOfWork();
                if(unitOfWork.isInTransaction() || unitOfWork.getParent().isExclusiveIsolatedClientSession()) {
                    return (T) unitOfWork.getAccessor().getConnection();
                }
                if (checkForTransaction(false) != null) { 
                    unitOfWork.beginEarlyTransaction();
                    Accessor accessor = unitOfWork.getAccessor();
                    // Ensure external connection is acquired.
                    accessor.incrementCallCount(unitOfWork.getParent());
                    accessor.decrementCallCount();
                    return (T) accessor.getDatasourceConnection();
                }
                return null;
            }
            throw new PersistenceException(ExceptionLocalization.buildMessage("Provider-does-not-support-the-call", null));

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    protected void basicBeginTransaction() throws DatabaseException {
        Collection<Accessor> accessors = getAccessors();
        if (accessors == null) {
            return;
    }
        Accessor failedAccessor = null;
        try {
            for (Accessor accessor : accessors) {
                failedAccessor = accessor;
                basicBeginTransaction(accessor);
            }

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    protected void basicBeginTransaction() throws DatabaseException {
        Collection<Accessor> accessors = getAccessors();
        if (accessors == null) {
            return;
    }
        Accessor failedAccessor = null;
        try {
            for (Accessor accessor : accessors) {
                failedAccessor = accessor;
                basicBeginTransaction(accessor);
            }

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    protected void basicBeginTransaction() throws DatabaseException {
        Collection<Accessor> accessors = getAccessors();
        if (accessors == null) {
            return;
    }
        Accessor failedAccessor = null;
        try {
            for (Accessor accessor : accessors) {
                failedAccessor = accessor;
                basicBeginTransaction(accessor);
            }

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                if(unitOfWork.isInTransaction() || unitOfWork.getParent().isExclusiveIsolatedClientSession()) {
                    return (T) unitOfWork.getAccessor().getConnection();
                }
                if (checkForTransaction(false) != null) { 
                    unitOfWork.beginEarlyTransaction();
                    Accessor accessor = unitOfWork.getAccessor();
                    // Ensure external connection is acquired.
                    accessor.incrementCallCount(unitOfWork.getParent());
                    accessor.decrementCallCount();
                    return (T) accessor.getConnection();
                }
                return null;
            }
            throw new PersistenceException(ExceptionLocalization.buildMessage("Provider-does-not-support-the-call", null));

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