Package org.apache.jackrabbit.oak.plugins.document

Examples of org.apache.jackrabbit.oak.plugins.document.NodeDocument$Children

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                                       final int maxCacheAge) {
        if (collection != Collection.NODES) {
            return findUncached(collection, key, DocumentReadPreference.PRIMARY);
        }
        CacheValue cacheKey = new StringValue(key);
        NodeDocument doc;
        if (maxCacheAge > 0 || preferCached) {
            // first try without lock
            doc = nodesCache.getIfPresent(cacheKey);
            if (doc != null) {
                if (preferCached ||
                        getTime() - doc.getCreated() < maxCacheAge) {
                    if (doc == NodeDocument.NULL) {
                        return null;
                    }
                    return (T) doc;
                }
            }
        }
        try {
            TreeLock lock = acquire(key);
            try {
                if (maxCacheAge == 0) {
                    invalidateCache(collection, key);
                }
                while (true) {
                    doc = nodesCache.get(cacheKey, new Callable<NodeDocument>() {
                        @Override
                        public NodeDocument call() throws Exception {
                            NodeDocument doc = (NodeDocument) findUncached(collection, key, getReadPreference(maxCacheAge));
                            if (doc == null) {
                                doc = NodeDocument.NULL;
                            }
                            return doc;
                        }
                    });
                    if (maxCacheAge == 0 || preferCached) {
                        break;
                    }
                    if (getTime() - doc.getCreated() < maxCacheAge) {
                        break;
                    }
                    // too old: invalidate, try again
                    invalidateCache(collection, key);
                }
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                        doc.seal();
                        String id = doc.getId();
                        CacheValue cacheKey = new StringValue(id);
                        // do not overwrite document in cache if the
                        // existing one in the cache is newer
                        NodeDocument cached = nodesCache.getIfPresent(cacheKey);
                        if (cached != null && cached != NodeDocument.NULL) {
                            // check mod count
                            Number cachedModCount = cached.getModCount();
                            Number modCount = doc.getModCount();
                            if (cachedModCount == null || modCount == null) {
                                throw new IllegalStateException(
                                        "Missing " + Document.MOD_COUNT);
                            }
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                //we can still read from secondary
                //TODO REVIEW Would that be safe
                ReadPreference readPreference = ReadPreference.primaryPreferred();
                if (parentId != null) {
                    long replicationSafeLimit = getTime() - maxReplicationLagMillis;
                    NodeDocument cachedDoc = (NodeDocument) getIfCached(collection, parentId);
                    if (cachedDoc != null && !cachedDoc.hasBeenModifiedSince(replicationSafeLimit)) {

                        //If parent has been modified loooong time back then there children
                        //would also have not be modified. In that case we can read from secondary
                        readPreference = getConfiguredReadPreference(collection);
                    }
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                                                   @Nullable T oldDoc,
                                                   @Nonnull UpdateOp updateOp) {
        // cache the new document
        if (collection == Collection.NODES) {
            CacheValue key = new StringValue(updateOp.getId());
            NodeDocument newDoc = (NodeDocument) collection.newDocument(this);
            if (oldDoc != null) {
                // we can only update the cache based on the oldDoc if we
                // still have the oldDoc in the cache, otherwise we may
                // update the cache with an outdated document
                NodeDocument cached = nodesCache.getIfPresent(key);
                if (cached == null) {
                    // cannot use oldDoc to update cache
                    return;
                }
                oldDoc.deepCopy(newDoc);
            }
            UpdateUtils.applyChanges(newDoc, updateOp, comparator);
            newDoc.seal();

            NodeDocument cached = addToCache(newDoc);
            if (cached == newDoc) {
                // successful
                return;
            }
            if (oldDoc == null) {
                // this is an insert and some other thread was quicker
                // loading it into the cache -> return now
                return;
            }
            // this is an update (oldDoc != null)
            if (Objects.equal(cached.getModCount(), oldDoc.getModCount())) {
                nodesCache.put(key, newDoc);
            } else {
                // the cache entry was modified by some other thread in
                // the meantime. the updated cache entry may or may not
                // include this update. we cannot just apply our update
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        // meantime. That is, use get() with a Callable,
        // which is only used when the document isn't there
        try {
            CacheValue key = new StringValue(doc.getId());
            for (;;) {
                NodeDocument cached = nodesCache.get(key,
                        new Callable<NodeDocument>() {
                    @Override
                    public NodeDocument call() {
                        return doc;
                    }
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    public String toString() {
        StringBuilder buff = new StringBuilder();
        buff.append("Nodes:\n");
        for (String p : nodes.keySet()) {
            buff.append("Path: ").append(p).append('\n');
            NodeDocument doc = nodes.get(p);
            for (String prop : doc.keySet()) {
                buff.append(prop).append('=').append(doc.get(prop)).append('\n');
            }
            buff.append("\n");
        }
        return buff.toString();
    }
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        if (collection != Collection.NODES) {
            return findUncachedWithRetry(collection, key,
                    DocumentReadPreference.PRIMARY, 2);
        }
        CacheValue cacheKey = new StringValue(key);
        NodeDocument doc;
        if (maxCacheAge > 0 || preferCached) {
            // first try without lock
            doc = nodesCache.getIfPresent(cacheKey);
            if (doc != null) {
                if (preferCached ||
                        getTime() - doc.getCreated() < maxCacheAge) {
                    if (doc == NodeDocument.NULL) {
                        return null;
                    }
                    return (T) doc;
                }
            }
        }
        Throwable t;
        try {
            TreeLock lock = acquire(key);
            try {
                if (maxCacheAge == 0) {
                    invalidateCache(collection, key);
                }
                while (true) {
                    doc = nodesCache.get(cacheKey, new Callable<NodeDocument>() {
                        @Override
                        public NodeDocument call() throws Exception {
                            NodeDocument doc = (NodeDocument) findUncachedWithRetry(
                                    collection, key,
                                    getReadPreference(maxCacheAge), 2);
                            if (doc == null) {
                                doc = NodeDocument.NULL;
                            }
                            return doc;
                        }
                    });
                    if (maxCacheAge == 0 || preferCached) {
                        break;
                    }
                    if (getTime() - doc.getCreated() < maxCacheAge) {
                        break;
                    }
                    // too old: invalidate, try again
                    invalidateCache(collection, key);
                }
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                        doc.seal();
                        String id = doc.getId();
                        CacheValue cacheKey = new StringValue(id);
                        // do not overwrite document in cache if the
                        // existing one in the cache is newer
                        NodeDocument cached = nodesCache.getIfPresent(cacheKey);
                        if (cached != null && cached != NodeDocument.NULL) {
                            // check mod count
                            Number cachedModCount = cached.getModCount();
                            Number modCount = doc.getModCount();
                            if (cachedModCount == null || modCount == null) {
                                throw new IllegalStateException(
                                        "Missing " + Document.MOD_COUNT);
                            }
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                // read from primary unless parent has not been modified
                // within replication lag period
                ReadPreference readPreference = ReadPreference.primary();
                if (parentId != null) {
                    long replicationSafeLimit = getTime() - maxReplicationLagMillis;
                    NodeDocument cachedDoc = (NodeDocument) getIfCached(collection, parentId);
                    // FIXME: this is not quite accurate, because ancestors
                    // are updated in a background thread (_lastRev). We
                    // will need to revise this for low maxReplicationLagMillis
                    // values
                    if (cachedDoc != null && !cachedDoc.hasBeenModifiedSince(replicationSafeLimit)) {

                        //If parent has been modified loooong time back then there children
                        //would also have not be modified. In that case we can read from secondary
                        readPreference = getConfiguredReadPreference(collection);
                    }
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                                                   @Nullable T oldDoc,
                                                   @Nonnull UpdateOp updateOp) {
        // cache the new document
        if (collection == Collection.NODES) {
            CacheValue key = new StringValue(updateOp.getId());
            NodeDocument newDoc = (NodeDocument) collection.newDocument(this);
            if (oldDoc != null) {
                // we can only update the cache based on the oldDoc if we
                // still have the oldDoc in the cache, otherwise we may
                // update the cache with an outdated document
                NodeDocument cached = nodesCache.getIfPresent(key);
                if (cached == null) {
                    // cannot use oldDoc to update cache
                    return;
                }
                oldDoc.deepCopy(newDoc);
            }
            UpdateUtils.applyChanges(newDoc, updateOp, comparator);
            newDoc.seal();

            NodeDocument cached = addToCache(newDoc);
            if (cached == newDoc) {
                // successful
                return;
            }
            if (oldDoc == null) {
                // this is an insert and some other thread was quicker
                // loading it into the cache -> return now
                return;
            }
            // this is an update (oldDoc != null)
            if (Objects.equal(cached.getModCount(), oldDoc.getModCount())) {
                nodesCache.put(key, newDoc);
            } else {
                // the cache entry was modified by some other thread in
                // the meantime. the updated cache entry may or may not
                // include this update. we cannot just apply our update
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