Examples with DeleteLogAction com.swiftmq.impl.store.standard.log.DeleteLogAction used on opensource projects

Example 1 with DeleteLogAction

use of com.swiftmq.impl.store.standard.log.DeleteLogAction in project swiftmq-ce by iitsoftware.

the class Index method moveNextToRoot.

private void moveNextToRoot(IndexPage current) throws Exception {
    if (ctx.traceSpace.enabled)
        ctx.traceSpace.trace("sys$store", toString() + "/moveNextToRoot...");
    IndexPage next = getIndexPage(current.getNextPage());
    byte[] beforeImage = new byte[current.getFirstFreePosition()];
    System.arraycopy(current.getPage().data, 0, beforeImage, 0, beforeImage.length);
    System.arraycopy(next.getPage().data, 0, current.getPage().data, 0, next.getFirstFreePosition());
    byte[] afterImage = new byte[next.getFirstFreePosition()];
    System.arraycopy(current.getPage().data, 0, afterImage, 0, afterImage.length);
    journal.add(new UpdatePortionLogAction(current.getPage().pageNo, 0, beforeImage, afterImage));
    current.setPrevPage(-1);
    current.initValues();
    journal.add(new DeleteLogAction(next.getPage().pageNo, afterImage));
    next.getPage().dirty = true;
    next.getPage().empty = true;
    if (next.getNextPage() != -1) {
        next = getIndexPage(next.getNextPage());
        next.setPrevPage(current.getPage().pageNo);
    }
    maxPage = -1;
    if (ctx.traceSpace.enabled)
        ctx.traceSpace.trace("sys$store", toString() + "/moveNextToRoot...done, current=" + current);
}

Example 2 with DeleteLogAction

use of com.swiftmq.impl.store.standard.log.DeleteLogAction in project swiftmq-ce by iitsoftware.

the class QueueIndex method remove.

public MessagePageReference remove(QueueIndexEntry indexEntry) throws Exception {
    if (ctx.traceSpace.enabled)
        ctx.traceSpace.trace("sys$store", toString() + "/remove, indexEntry=" + indexEntry);
    remove(indexEntry.getKey());
    Integer rootPageNo = Integer.valueOf(indexEntry.getRootPageNo());
    MessagePageReference ref = ctx.referenceMap.getReference(rootPageNo, false);
    if (ref != null)
        ref = ref.decRefCountAndMarkActive();
    if (ref == null) {
        if (ctx.traceSpace.enabled)
            ctx.traceSpace.trace("sys$store", toString() + "/remove, indexEntry=" + indexEntry + ", no more refs, REMOVE message");
        ctx.referenceMap.removeReference(rootPageNo);
        MessagePage mp = new MessagePage(ctx.cacheManager.fetchAndPin(rootPageNo.intValue()));
        int next = -1;
        do {
            mpList.add(mp.page);
            if (mp.page.pageNo == 0) {
                // This MUST NOT happen after a failover. We just ignore it.
                ctx.logSwiftlet.logWarning("sys$store", toString() + "/try to delete a message page which was already deleted, ignore. indexEntry: " + indexEntry);
                break;
            }
            byte[] bi = new byte[mp.getLength()];
            System.arraycopy(mp.page.data, 0, bi, 0, bi.length);
            journal.add(new DeleteLogAction(mp.page.pageNo, bi));
            mp.page.dirty = true;
            mp.page.empty = true;
            next = mp.getNextPage();
            if (next != -1)
                mp = new MessagePage(ctx.cacheManager.fetchAndPin(next));
        } while (next != -1);
    } else {
        if (ctx.traceSpace.enabled)
            ctx.traceSpace.trace("sys$store", toString() + "/remove, indexEntry=" + indexEntry + ", ref is " + ref + ", HOLD message");
    }
    if (ctx.traceSpace.enabled)
        ctx.traceSpace.trace("sys$store", toString() + "/remove done, indexEntry=" + indexEntry);
    return ref;
}

Example 3 with DeleteLogAction

use of com.swiftmq.impl.store.standard.log.DeleteLogAction in project swiftmq-ce by iitsoftware.

the class RootIndex method deleteQueueIndex.

public synchronized void deleteQueueIndex(String queueName, QueueIndex queueIndex) throws Exception {
    List entries = queueIndex.getEntries();
    Semaphore sem = new Semaphore();
    List journal = new ArrayList();
    queueIndex.setJournal(journal);
    List refs = new ArrayList();
    for (Iterator iter = entries.iterator(); iter.hasNext(); ) {
        MessagePageReference ref = queueIndex.remove((QueueIndexEntry) iter.next());
        if (ref != null)
            refs.add(ref);
        if (journal.size() > 10000) {
            long txId = ctx.transactionManager.createTxId();
            CommitLogRecord logRecord = new CommitLogRecord(txId, sem, journal, new QueueIndexRelease(queueIndex), refs);
            ctx.recoveryManager.commit(logRecord);
            sem.waitHere();
            sem.reset();
            journal.clear();
            refs = new ArrayList();
            ctx.transactionManager.removeTxId(txId);
        }
    }
    IndexPage root = queueIndex.getIndexPage(queueIndex.getRootPageNo());
    byte[] bi = new byte[root.getFirstFreePosition()];
    System.arraycopy(root.getPage().data, 0, bi, 0, bi.length);
    journal.add(new DeleteLogAction(root.getPage().pageNo, bi));
    root.getPage().dirty = true;
    root.getPage().empty = true;
    setJournal(journal);
    remove(queueName);
    long txId = ctx.transactionManager.createTxId();
    CommitLogRecord logRecord = new CommitLogRecord(txId, sem, journal, new QueueRootIndexRelease(this, queueIndex), refs);
    ctx.recoveryManager.commit(logRecord);
    sem.waitHere();
    ctx.transactionManager.removeTxId(txId);
}

Example 4 with DeleteLogAction

use of com.swiftmq.impl.store.standard.log.DeleteLogAction in project swiftmq-ce by iitsoftware.

the class Index method remove.

/**
 * @param key
 */
public void remove(Comparable key) throws Exception {
    if (ctx.traceSpace.enabled)
        ctx.traceSpace.trace("sys$store", toString() + "/remove, key=" + key + "...");
    if (journal == null)
        throw new NullPointerException("journal is null!");
    IndexPage current = loadPageForKey(key);
    if (current == null)
        throw new Exception("remove(" + key + "): page not found!");
    boolean found = false;
    if (ctx.traceSpace.enabled)
        ctx.traceSpace.trace("sys$store", toString() + "/remove, before=" + current.getContent());
    for (Iterator iter = current.iterator(); iter.hasNext(); ) {
        IndexEntry entry = (IndexEntry) iter.next();
        if (entry.isValid()) {
            if (entry.getKey().equals(key)) {
                iter.remove();
                if (current.getNumberValidEntries() == 0) {
                    if (current.getPage().pageNo == rootPageNo) {
                        current.getPage().dirty = true;
                        // never delete the root
                        current.getPage().empty = false;
                        if (current.getNextPage() != -1)
                            moveNextToRoot(current);
                    } else {
                        byte[] bi = new byte[current.getFirstFreePosition()];
                        System.arraycopy(current.getPage().data, 0, bi, 0, bi.length);
                        journal.add(new DeleteLogAction(current.getPage().pageNo, bi));
                        current.getPage().dirty = true;
                        current.getPage().empty = true;
                        rechainAfterDelete(current);
                    }
                }
                found = true;
                break;
            }
        }
    }
    if (ctx.traceSpace.enabled)
        ctx.traceSpace.trace("sys$store", toString() + "/remove, found=" + found + ", after=" + current.getContent());
    if (!found)
        throw new Exception("remove(" + key + "): key not found in page!");
    if (ctx.traceSpace.enabled)
        ctx.traceSpace.trace("sys$store", toString() + "/remove, key=" + key + "...done.");
}