Examples of com.sleepycat.je.tree.IN.latch()

com.sleepycat.je.tree.IN.latch()
Latch this node exclusive, optionally setting the generation.

             * getParentINForChildIN takes exclusive latches above, so we use
             * fetchTargetWithExclusiveLatch.
             */
            final IN in = (IN) result.parent.fetchTargetWithExclusiveLatch
                (result.index);
            in.latch(Cleaner.UPDATE_GENERATION);
            return in;
        } finally {
            if ((result != null) && (result.exactParentFound)) {
                result.parent.releaseLatch();
            }

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            public IN doWork(ChildReference root)
                throws DatabaseException {


                IN rootIN = (IN) root.fetchTarget(db, null);
                rootIN.latch(CacheMode.UNCHANGED);
                try {
                    /* Re-check that all conditions still hold. */
                    boolean isDirty = rootIN.getDirty();
                    if (rootIN == target &&
                        rootIN.isDbRoot() &&

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                /*
                 * Log entry is same or newer than what's in the tree.  Dirty
                 * the IN and let checkpoint write it out.
                 */
                IN in = (IN) result.parent.fetchTarget(result.index);
                in.latch(false);
                return in;
            }
        } finally {
            if ((result != null) && (result.exactParentFound)) {
                result.parent.releaseLatch();

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                return null;
            }


            if (DbLsn.compareTo(root.getLsn(), lsn) <= 0) {
                IN rootIN = (IN) root.fetchTarget(db, null);
                rootIN.latch(false);
                return rootIN;
            } else {
                return null;
            }
        }

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        try {
            Iterator iter = inMemINs.iterator();
            while (iter.hasNext()) {
                IN in = (IN) iter.next();
                in.latch(false);
                try {
                    totalSize = mb.accumulateNewUsage(in, totalSize);


                    if (in.getDirty()) {
                        Integer level = new Integer(in.getLevel());

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      if (root == null) {
    return null;
      }
            IN rootIN = (IN) root.fetchTarget(db, null);
            rootIN.latch(false);
            try {
                if (rootIN.getNodeId() == targetNodeId) {


                    /* 
         * stillRoot handles the situation where the root was split

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       * and the log LSN is the current log entry.
             */
            IN in = reader.getIN();
            long inLsn = reader.getLsnOfIN();
            in.postRecoveryInit(db, inLsn);
            in.latch();
            replaceOrInsert(db, in, reader.getLastLsn(), inLsn,
                            requireExactMatch);
        }


        /*

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        long total = 0;
        try {
            Iterator iter = inList.iterator();
            while (iter.hasNext()) {
                IN in = (IN) iter.next();
                in.latch();
                try {
                    assert in.verifyMemorySize():
                        "in nodeId=" + in.getNodeId() +
                        ' ' + in.getClass().getName();
                    total += in.getInMemorySize();

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                        result.parent.updateEntry(result.index, in);
                    }
                } else {
                    in = (IN) result.parent.fetchTarget(result.index);
                }
                in.latch(Cleaner.UPDATE_GENERATION);
                return in;
            }
        } finally {
            if ((result != null) && (result.exactParentFound)) {
                result.parent.releaseLatch();

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                return null;
            }


            if (DbLsn.compareTo(root.getLsn(), lsn) <= 0) {
                IN rootIN = (IN) root.fetchTarget(db, null);
                rootIN.latch(Cleaner.UPDATE_GENERATION);
                return rootIN;
            } else {
                return null;
            }
        }

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