org.eclipse.persistence.services.DevelopmentServices Maven / Gradle / Ivy
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/*
* Copyright (c) 1998, 2021 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// Oracle - initial API and implementation from Oracle TopLink
// @author mobrien
// @since EclipseLink 1.0 enh# 235168
package org.eclipse.persistence.services;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import org.eclipse.persistence.descriptors.ClassDescriptor;
import org.eclipse.persistence.internal.helper.ClassConstants;
import org.eclipse.persistence.internal.identitymaps.IdentityMap;
import org.eclipse.persistence.internal.security.PrivilegedAccessHelper;
import org.eclipse.persistence.internal.security.PrivilegedClassForName;
import org.eclipse.persistence.internal.sessions.AbstractSession;
import org.eclipse.persistence.internal.sessions.DatabaseSessionImpl;
import org.eclipse.persistence.sessions.DatabaseLogin;
import org.eclipse.persistence.sessions.Session;
import org.eclipse.persistence.sessions.factories.XMLProjectReader;
/**
*
* Purpose: Provide a dynamic interface into the EclipseLink Identity Map Manager.
*
* Description: This class is meant to provide a framework for gaining access to configuration and
* statistics of the EclipseLink Cache during runtime. It will provide the basis for development
* of a JMX service and possibly other frameworks.
*
*/
public class DevelopmentServices {
/** stores access to the session object that we are controlling */
protected Session session;
/**
* Default constructor
*/
public DevelopmentServices() {
}
/**
* Constructor
* @param session the session for these services
*/
public DevelopmentServices(Session session) {
this.session = session;
}
/**
* This method is used to clear the contents of a particular identity map. Users should be
* aware that if any of these objects are in use when this action is completed they will lose object identity.
* @param className the fully qualified name of the class for which the identity map should be cleared.
* @exception ClassNotFoundException thrown then the IdenityMap for that class name could not be found
*/
public void initializeIdentityMap(String className) throws ClassNotFoundException {
Class classToChange = getSession().getDatasourcePlatform().getConversionManager().convertObject(className, ClassConstants.CLASS);
getSession().getIdentityMapAccessorInstance().initializeIdentityMap(classToChange);
}
/**
* This method is used to clear the contents of all identity maps. Users should be
* aware that if any of these objects are in use when this action is completed they will lose object identity.
*/
public void initializeAllIdentityMaps() {
getSession().getIdentityMapAccessorInstance().initializeIdentityMaps();
}
/**
* This method will be used to set a new type of identity map for a particular class type. If objects
* of that class type are in use loss of object identity will result. For prevention client may wish to
* initialize all identity maps first.
* @param className the fully qualified className to set the identity map for.
* @param identityMapClassType the fully qualified class name of the new identity map type.
* @param maxSize the maximum size to be specified for the new identity map.
* @exception ClassNotFoundException thrown then the IdenityMap for that class name could not be found
*/
public void setIdentityMapForClass(String className, String identityMapClassType, int maxSize) throws ClassNotFoundException {
Class classToChange = getSession().getDatasourcePlatform().getConversionManager().convertObject(className, ClassConstants.CLASS);
Class identityMapClass = null;
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
try{
identityMapClass = AccessController.doPrivileged(new PrivilegedClassForName<>(identityMapClassType));
}catch (PrivilegedActionException ex){
throw (RuntimeException)ex.getCause();
}
}else{
identityMapClass = PrivilegedAccessHelper.getClassForName(identityMapClassType);
}
ClassDescriptor descriptor = getSession().getDescriptor(classToChange);
descriptor.setIdentityMapClass(identityMapClass);
descriptor.setIdentityMapSize(maxSize);
getSession().getIdentityMapAccessorInstance().initializeIdentityMap(classToChange);
}
/**
* This method used to reset a project in a session. All connected clients will get errors.
* project must be of the xml type. This attribute will not be stored on a save.
* @param projectFilePath the filename of the project xml file to build the new project from.
*/
public void refreshProject(String projectFilePath) {
((DatabaseSessionImpl)getSession()).logout();
getSession().setProject(XMLProjectReader.read(projectFilePath));
((DatabaseSessionImpl)getSession()).login();
}
/**
* This method is used to update the cache size of a particular Identity Map
* @param className the name of the class for which to update the identity map size.
* @exception ClassNotFoundException thrown then the IdenityMap for that class name could not be found
*/
public void updateCacheSize(String className, int newSize) throws ClassNotFoundException {
Class classToChange = getSession().getDatasourcePlatform().getConversionManager().convertObject(className, ClassConstants.CLASS);
getSession().getIdentityMapAccessorInstance().getIdentityMap(classToChange).updateMaxSize(newSize);
}
/**
* This method is used to control if All parameters should be bound
*/
public void setShouldBindAllParameters(boolean shouldBindAllParameters) {
if (!(getSession().getDatasourceLogin() instanceof DatabaseLogin)) {
return;
}
((DatabaseLogin)getSession().getDatasourceLogin()).setShouldBindAllParameters(shouldBindAllParameters);
}
/**
* Method returns if all Parameters should be bound or not
*/
public boolean getShouldBindAllParameters() {
if (!(getSession().getDatasourceLogin() instanceof DatabaseLogin)) {
return false;
}
return ((DatabaseLogin)getSession().getDatasourceLogin()).shouldBindAllParameters();
}
/**
* Sets the size of strings after which they will be bound into the statement
*/
public void setStringBindingSize(int size) {
if (!(getSession().getDatasourceLogin() instanceof DatabaseLogin)) {
return;
}
((DatabaseLogin)getSession().getDatasourceLogin()).setStringBindingSize(size);
}
/**
* Return the size of strings after which will be bound into the statement
*/
public int getStringBindingSize() {
if (!(getSession().getDatasourceLogin() instanceof DatabaseLogin)) {
return 0;
}
return ((DatabaseLogin)getSession().getDatasourceLogin()).getStringBindingSize();
}
/**
* This method is used to turn on EclipseLink Batch Writing. Please note that toggling this
* setting while a transaction is open may result in unordered sql statements or loss of statements.
* Also please note that EclipseLink Batch Writing may not work with all JDBC Drivers
*/
public void setUsesBatchWriting(boolean usesBatchWriting) {
if (!(getSession().getDatasourceLogin() instanceof DatabaseLogin)) {
return;
}
((DatabaseLogin)getSession().getDatasourceLogin()).setUsesBatchWriting(usesBatchWriting);
}
/**
* This method will return if batchWriting is in use or not.
*/
public boolean getUsesBatchWriting() {
return getSession().getDatasourceLogin().getPlatform().usesBatchWriting();
}
/**
* This method is used to turn on JDBC Batch Writing. Please note that toggling this
* setting while a transaction is open may result in mis-ordered sql statements or loss of statements.
*
*/
public void setUsesJDBCBatchWriting(boolean usesJDBCBatchWriting) {
if (!(getSession().getDatasourceLogin() instanceof DatabaseLogin)) {
return;
}
((DatabaseLogin)getSession().getDatasourceLogin()).setUsesJDBCBatchWriting(usesJDBCBatchWriting);
}
/**
* This method will return if batchWriting is in use or not.
*/
public boolean getUsesJDBCBatchWriting() {
return getSession().getDatasourceLogin().getPlatform().usesJDBCBatchWriting();
}
/**
* This method allows control of whether byte arrays should be bound into the statement or not.
* Toggling this attribute while an SQL statement is being built, or if you are caching statements, will
* result in errors.
*/
public void setUsesByteArrayBinding(boolean usesByteArrayBinding) {
if (!(getSession().getDatasourceLogin() instanceof DatabaseLogin)) {
return;
}
((DatabaseLogin)getSession().getDatasourceLogin()).setUsesByteArrayBinding(usesByteArrayBinding);
}
/**
* Shows if Byte Array Binding is turned on or not
*/
public boolean getUsesByteArrayBinding() {
return getSession().getDatasourceLogin().getPlatform().usesByteArrayBinding();
}
/**
* This method allows the client to set if Native SQL should be used.
*/
public void setUsesNativeSQL(boolean usesNativeSQL) {
if (!(getSession().getDatasourceLogin() instanceof DatabaseLogin)) {
return;
}
((DatabaseLogin)getSession().getDatasourceLogin()).setUsesNativeSQL(usesNativeSQL);
}
/**
* Shows if native SQL is being used
*/
public boolean getUsesNativeSQL() {
return getSession().getDatasourceLogin().getPlatform().usesNativeSQL();
}
/**
* This method is used to set if streams should be used for binding. Please note that toggling this
* attribute while a statement is being built will result in errors.
*/
public void setUsesStreamsForBinding(boolean usesStreamsForBinding) {
if (!(getSession().getDatasourceLogin() instanceof DatabaseLogin)) {
return;
}
((DatabaseLogin)getSession().getDatasourceLogin()).setUsesStreamsForBinding(usesStreamsForBinding);
}
/**
* This method indicates if streams are being used for binding
*/
public boolean getUsesStreamsForBinding() {
return getSession().getDatasourceLogin().getPlatform().usesStreamsForBinding();
}
/**
* Allows the client to set if String should be bound into the statement or not. Please note that
* toggling this attribute while a statement is being built, or if statement caching is being used, will result
* in errors.
*/
public void setUsesStringBinding(boolean usesStringBinding) {
if (!(getSession().getDatasourceLogin() instanceof DatabaseLogin)) {
return;
}
((DatabaseLogin)getSession().getDatasourceLogin()).setUsesStringBinding(usesStringBinding);
}
/**
* This method indicates if Strings are being bound
*/
public boolean getUsesStringBinding() {
if (!(getSession().getDatasourceLogin() instanceof DatabaseLogin)) {
return false;
}
return getSession().getDatasourceLogin().getPlatform().usesStringBinding();
}
/**
* INTERNAL:
*/
protected AbstractSession getSession() {
return (AbstractSession)this.session;
}
}