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/*
* Copyright (C) 2015 Archie L. Cobbs. All rights reserved.
*/
package org.jsimpledb.vaadin;
import com.vaadin.server.VaadinSession;
import org.jsimpledb.JSimpleDB;
import org.jsimpledb.JTransaction;
import org.jsimpledb.core.Transaction;
/**
* A {@link JObjectContainer} that supports a {@link #reload} operation.
*
*
* Instances automatically {@link #reload} themselves when {@link #connect}'ed.
*/
@SuppressWarnings("serial")
public abstract class ReloadableJObjectContainer extends JObjectContainer {
private VaadinSession vaadinSession;
// Constructors
/**
* Constructor.
*
* @param jdb {@link JSimpleDB} database
* @param type type restriction, or null for no restriction
* @throws IllegalArgumentException if {@code jdb} is null
*/
protected ReloadableJObjectContainer(JSimpleDB jdb, Class type) {
super(jdb, type);
}
// Connectable
@Override
public void connect() {
super.connect();
this.vaadinSession = VaadinSession.getCurrent();
this.reload();
}
@Override
public void disconnect() {
super.disconnect();
this.vaadinSession = null;
}
// Methods
/**
* (Re)load this container.
*
*
* May have no effect if this instance is not {@link #connect}'ed.
*/
public abstract void reload();
/**
* Reload this container after the transaction open in the current thread successfully commits.
*
*
* Does nothing if the current transaction fails or this instance is not {@link #connect}'ed.
*
* @throws IllegalStateException if there is no {@link JTransaction} associated with the current thread
*/
public void reloadAfterCommit() {
JTransaction.getCurrent().getTransaction().addCallback(new Transaction.CallbackAdapter() {
@Override
public void afterCommit() {
if (ReloadableJObjectContainer.this.vaadinSession == null)
return;
ReloadableJObjectContainer.this.vaadinSession.access(() -> {
if (ReloadableJObjectContainer.this.vaadinSession != null)
ReloadableJObjectContainer.this.reload();
});
}
});
}
}