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Posted to ojb-dev@db.apache.org by ar...@apache.org on 2003/12/11 20:16:21 UTC
cvs commit: db-ojb/src/java/org/apache/ojb/odmg/locking LockStrategy.java LockManager.java LockMap.java
arminw 2003/12/11 11:16:21
Modified: src/java/org/apache/ojb/odmg/locking LockStrategy.java
LockManager.java LockMap.java
Log:
remove blank lines
Revision Changes Path
1.3 +1 -120 db-ojb/src/java/org/apache/ojb/odmg/locking/LockStrategy.java
Index: LockStrategy.java
===================================================================
RCS file: /home/cvs/db-ojb/src/java/org/apache/ojb/odmg/locking/LockStrategy.java,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -r1.2 -r1.3
--- LockStrategy.java 17 Jun 2002 19:34:31 -0000 1.2
+++ LockStrategy.java 11 Dec 2003 19:16:21 -0000 1.3
@@ -1,120 +1 @@
-package org.apache.ojb.odmg.locking;
-
-/* ====================================================================
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 2001 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Apache" and "Apache Software Foundation" and
- * "Apache ObjectRelationalBridge" must not be used to endorse or promote products
- * derived from this software without prior written permission. For
- * written permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * "Apache ObjectRelationalBridge", nor may "Apache" appear in their name, without
- * prior written permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
-
-
-import org.apache.ojb.odmg.TransactionImpl;
-
-/**
- * this interface defines method that a Locking Strategy must implement
- * according to the transaction isolation level it represents. *
- */
-public interface LockStrategy
-{
-
- /**
- * acquire a read lock on Object obj for Transaction tx.
- * @param tx the transaction requesting the lock
- * @param obj the Object to be locked
- * @return true if successful, else false
- *
- */
- public boolean readLock(TransactionImpl tx, Object obj);
-
- /**
- * acquire a write lock on Object obj for Transaction tx.
- * @param tx the transaction requesting the lock
- * @param obj the Object to be locked
- * @return true if successful, else false
- *
- */
- public boolean writeLock(TransactionImpl tx, Object obj);
-
- /**
- * acquire a lock upgrade (from read to write) lock on Object obj for Transaction tx.
- * @param tx the transaction requesting the lock
- * @param obj the Object to be locked
- * @return true if successful, else false
- *
- */
- public boolean upgradeLock(TransactionImpl tx, Object obj);
-
- /**
- * release a lock on Object obj for Transaction tx.
- * @param tx the transaction releasing the lock
- * @param obj the Object to be unlocked
- * @return true if successful, else false
- *
- */
- public boolean releaseLock(TransactionImpl tx, Object obj);
-
- /**
- * checks whether the specified Object obj is read-locked by Transaction tx.
- * @param tx the transaction
- * @param obj the Object to be checked
- * @return true if lock exists, else false
- */
- public boolean checkRead(TransactionImpl tx, Object obj);
-
- /**
- * checks whether the specified Object obj is write-locked by Transaction tx.
- * @param tx the transaction
- * @param obj the Object to be checked
- * @return true if lock exists, else false
- */
- public boolean checkWrite(TransactionImpl tx, Object obj);
-
-
-}
+package org.apache.ojb.odmg.locking;
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache ObjectRelationalBridge" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* "Apache ObjectRelationalBridge", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import org.apache.ojb.odmg.TransactionImpl;
/**
* this interface defines method that a Locking Strategy must implement
* according to the transaction isolation level it represents. *
*/
public interface LockStrategy
{
/**
* acquire a read lock on Object obj for Transaction tx.
* @param tx the transaction requesting the lock
* @param obj the Object to be locked
* @return true if successful, else false
*
*/
public boolean readLock(TransactionImpl tx, Object obj);
/**
* acquire a write lock on Object obj for Transaction tx.
* @param tx the transaction requesting the lock
* @param obj the Object to be locked
* @return true if successful, else false
*
*/
public boolean writeLock(TransactionImpl tx, Object obj);
/**
* acquire a lock upgrade (from read to write) lock on Object obj for Transaction tx.
* @param tx the transaction requesting the lock
* @param obj the Object to be locked
* @return true if successful, else false
*
*/
public boolean upgradeLock(TransactionImpl tx, Object obj);
/**
* release a lock on Object obj for Transaction tx.
* @param tx the transaction releasing the lock
* @param obj the Object to be unlocked
* @return true if successful, else false
*
*/
public boolean releaseLock(TransactionImpl tx, Object obj);
/**
* checks whether the specified Object obj is read-locked by Transaction tx.
* @param tx the transaction
* @param obj the Object to be checked
* @return true if lock exists, else false
*/
public boolean checkRead(TransactionImpl tx, Object obj);
/**
* checks whether the specified Object obj is write-locked by Transaction tx.
* @param tx the transaction
* @param obj the Object to be checked
* @return true if lock exists, else false
*/
public boolean checkWrite(TransactionImpl tx, Object obj);
}
\ No newline at end of file
1.3 +1 -110 db-ojb/src/java/org/apache/ojb/odmg/locking/LockManager.java
Index: LockManager.java
===================================================================
RCS file: /home/cvs/db-ojb/src/java/org/apache/ojb/odmg/locking/LockManager.java,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -r1.2 -r1.3
--- LockManager.java 17 Jun 2002 19:34:30 -0000 1.2
+++ LockManager.java 11 Dec 2003 19:16:21 -0000 1.3
@@ -1,110 +1 @@
-package org.apache.ojb.odmg.locking;
-
-/* ====================================================================
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 2001 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Apache" and "Apache Software Foundation" and
- * "Apache ObjectRelationalBridge" must not be used to endorse or promote products
- * derived from this software without prior written permission. For
- * written permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * "Apache ObjectRelationalBridge", nor may "Apache" appear in their name, without
- * prior written permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
-
-import org.apache.ojb.odmg.TransactionImpl;
-
-/**
- * This interface declares the functionality of the OJB internal Locking mechanism.
- * A default implementaion LockManagerDefaultImpl is provided. This implementaion
- * keeps distributed locks in the database. The locking mechanisms thus involves a
- * lot of database lookups and writes. For some environments this solution may not
- * be adequate. OJB allows to provide user defined implementations of this interface.
- * To activate a user defined LockManagerDefaultImpl it must be configured in the OJB.properties file.
- *
- *
- * @author thma
- */
-public interface LockManager
-{
- /**
- * aquires a readlock for transaction tx on object obj.
- * Returns true if successful, else false.
- */
- public abstract boolean readLock(TransactionImpl tx, Object obj);
-
- /**
- * aquires a writelock for transaction tx on object obj.
- * Returns true if successful, else false.
- */
- public abstract boolean writeLock(TransactionImpl tx, Object obj);
-
- /**
- * upgrades readlock for transaction tx on object obj to a writelock.
- * If no readlock existed a writelock is acquired anyway.
- * Returns true if successful, else false.
- */
- public abstract boolean upgradeLock(TransactionImpl tx, Object obj);
-
- /**
- * releases a lock for transaction tx on object obj.
- * Returns true if successful, else false.
- */
- public abstract boolean releaseLock(TransactionImpl tx, Object obj);
-
- /**
- * checks if there is a readlock for transaction tx on object obj.
- * Returns true if so, else false.
- */
- public abstract boolean checkRead(TransactionImpl tx, Object obj);
-
- /**
- * checks if there is a writelock for transaction tx on object obj.
- * Returns true if so, else false.
- */
- public abstract boolean checkWrite(TransactionImpl tx, Object obj);
-
-
-}
+package org.apache.ojb.odmg.locking;
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache ObjectRelationalBridge" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* "Apache ObjectRelationalBridge", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import org.apache.ojb.odmg.TransactionImpl;
/**
* This interface declares the functionality of the OJB internal Locking mechanism.
* A default implementaion LockManagerDefaultImpl is provided. This implementaion
* keeps distributed locks in the database. The locking mechanisms thus involves a
* lot of database lookups and writes. For some environments this solution may not
* be adequate. OJB allows to provide user defined implementations of this interface.
* To activate a user defined LockManagerDefaultImpl it must be configured in the OJB.properties file.
*
*
* @author thma
*/
public interface LockManager
{
/**
* aquires a readlock for transaction tx on object obj.
* Returns true if successful, else false.
*/
public abstract boolean readLock(TransactionImpl tx, Object obj);
/**
* aquires a writelock for transaction tx on object obj.
* Returns true if successful, else false.
*/
public abstract boolean writeLock(TransactionImpl tx, Object obj);
/**
* upgrades readlock for transaction tx on object obj to a writelock.
* If no readlock existed a writelock is acquired anyway.
* Returns true if successful, else false.
*/
public abstract boolean upgradeLock(TransactionImpl tx, Object obj);
/**
* releases a lock for transaction tx on object obj.
* Returns true if successful, else false.
*/
public abstract boolean releaseLock(TransactionImpl tx, Object obj);
/**
* checks if there is a readlock for transaction tx on object obj.
* Returns true if so, else false.
*/
public abstract boolean checkRead(TransactionImpl tx, Object obj);
/**
* checks if there is a writelock for transaction tx on object obj.
* Returns true if so, else false.
*/
public abstract boolean checkWrite(TransactionImpl tx, Object obj);
}
\ No newline at end of file
1.3 +1 -116 db-ojb/src/java/org/apache/ojb/odmg/locking/LockMap.java
Index: LockMap.java
===================================================================
RCS file: /home/cvs/db-ojb/src/java/org/apache/ojb/odmg/locking/LockMap.java,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -r1.2 -r1.3
--- LockMap.java 17 Jun 2002 19:34:30 -0000 1.2
+++ LockMap.java 11 Dec 2003 19:16:21 -0000 1.3
@@ -1,116 +1 @@
-/*
- * Created by: thma
- * Date: May 4, 2001
- */
-package org.apache.ojb.odmg.locking;
-
-/* ====================================================================
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 2001 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Apache" and "Apache Software Foundation" and
- * "Apache ObjectRelationalBridge" must not be used to endorse or promote products
- * derived from this software without prior written permission. For
- * written permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * "Apache ObjectRelationalBridge", nor may "Apache" appear in their name, without
- * prior written permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
-
-import org.apache.ojb.odmg.TransactionImpl;
-
-import java.util.Collection;
-
-public interface LockMap
-{
- /**
- * returns the LockEntry for the Writer of object obj.
- * If now writer exists, null is returned.
- */
- public LockEntry getWriter(Object obj);
-
- /**
- * returns a collection of Reader LockEntries for object obj.
- * If now LockEntries could be found an empty Vector is returned.
- */
- public Collection getReaders(Object obj);
-
- /**
- * Add a reader lock entry for transaction tx on object obj
- * to the persistent storage.
- */
- public boolean addReader(TransactionImpl tx, Object obj);
-
- /**
- * remove a reader lock entry for transaction tx on object obj
- * from the persistent storage.
- */
- public void removeReader(TransactionImpl tx, Object obj);
-
- /**
- * remove a writer lock entry for transaction tx on object obj
- * from the persistent storage.
- */
- public void removeWriter(LockEntry writer);
-
- /**
- * upgrade a reader lock entry for transaction tx on object obj
- * and write it to the persistent storage.
- */
- public boolean upgradeLock(LockEntry reader);
-
- /**
- * generate a writer lock entry for transaction tx on object obj
- * and write it to the persistent storage.
- */
- public boolean setWriter(TransactionImpl tx, Object obj);
-
- /**
- * check if there is a reader lock entry for transaction tx on object obj
- * in the persistent storage.
- */
- public boolean hasReadLock(TransactionImpl tx, Object obj);
-
-
-}
+/*
* Created by: thma
* Date: May 4, 2001
*/
package org.apache.ojb.odmg.locking;
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache ObjectRelationalBridge" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* "Apache ObjectRelationalBridge", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import org.apache.ojb.odmg.TransactionImpl;
import java.util.Collection;
public interface LockMap
{
/**
* returns the LockEntry for the Writer of object obj.
* If now writer exists, null is returned.
*/
public LockEntry getWriter(Object obj);
/**
* returns a collection of Reader LockEntries for object obj.
* If now LockEntries could be found an empty Vector is returned.
*/
public Collection getReaders(Object obj);
/**
* Add a reader lock entry for transaction tx on object obj
* to the persistent storage.
*/
public boolean addReader(TransactionImpl tx, Object obj);
/**
* remove a reader lock entry for transaction tx on object obj
* from the persistent storage.
*/
public void removeReader(TransactionImpl tx, Object obj);
/**
* remove a writer lock entry for transaction tx on object obj
* from the persistent storage.
*/
public void removeWriter(LockEntry writer);
/**
* upgrade a reader lock entry for transaction tx on object obj
* and write it to the persistent storage.
*/
public boolean upgradeLock(LockEntry reader);
/**
* generate a writer lock entry for transaction tx on object obj
* and write it to the persistent storage.
*/
public boolean setWriter(TransactionImpl tx, Object obj);
/**
* check if there is a reader lock entry for transaction tx on object obj
* in the persistent storage.
*/
public boolean hasReadLock(TransactionImpl tx, Object obj);
}
\ No newline at end of file
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