Example usage for java.util SortedMap clear

Introduction

In this page you can find the example usage for java.util SortedMap clear.

Prototype

void clear();

Source Link

Document

Removes all of the mappings from this map (optional operation).

Usage

From source file:org.apache.hadoop.hbase.replication.ReplicationZookeeper.java

/**
 * It "atomically" copies all the hlogs queues from another region server and returns them all
 * sorted per peer cluster (appended with the dead server's znode).
 * @param znode//from  w  w  w. j av  a 2 s  . com
 * @return HLog queues sorted per peer cluster
 */
public SortedMap<String, SortedSet<String>> copyQueuesFromRSUsingMulti(String znode) {
    SortedMap<String, SortedSet<String>> queues = new TreeMap<String, SortedSet<String>>();
    String deadRSZnodePath = ZKUtil.joinZNode(rsZNode, znode);// hbase/replication/rs/deadrs
    List<String> peerIdsToProcess = null;
    List<ZKUtilOp> listOfOps = new ArrayList<ZKUtil.ZKUtilOp>();
    try {
        peerIdsToProcess = ZKUtil.listChildrenNoWatch(this.zookeeper, deadRSZnodePath);
        if (peerIdsToProcess == null)
            return queues; // node already processed
        for (String peerId : peerIdsToProcess) {
            String newPeerId = peerId + "-" + znode;
            String newPeerZnode = ZKUtil.joinZNode(this.rsServerNameZnode, newPeerId);
            // check the logs queue for the old peer cluster
            String oldClusterZnode = ZKUtil.joinZNode(deadRSZnodePath, peerId);
            List<String> hlogs = ZKUtil.listChildrenNoWatch(this.zookeeper, oldClusterZnode);
            if (hlogs == null || hlogs.size() == 0)
                continue; // empty log queue.
            // create the new cluster znode
            SortedSet<String> logQueue = new TreeSet<String>();
            queues.put(newPeerId, logQueue);
            ZKUtilOp op = ZKUtilOp.createAndFailSilent(newPeerZnode, HConstants.EMPTY_BYTE_ARRAY);
            listOfOps.add(op);
            // get the offset of the logs and set it to new znodes
            for (String hlog : hlogs) {
                String oldHlogZnode = ZKUtil.joinZNode(oldClusterZnode, hlog);
                byte[] logOffset = ZKUtil.getData(this.zookeeper, oldHlogZnode);
                LOG.debug("Creating " + hlog + " with data " + Bytes.toString(logOffset));
                String newLogZnode = ZKUtil.joinZNode(newPeerZnode, hlog);
                listOfOps.add(ZKUtilOp.createAndFailSilent(newLogZnode, logOffset));
                // add ops for deleting
                listOfOps.add(ZKUtilOp.deleteNodeFailSilent(oldHlogZnode));
                logQueue.add(hlog);
            }
            // add delete op for peer
            listOfOps.add(ZKUtilOp.deleteNodeFailSilent(oldClusterZnode));
        }
        // add delete op for dead rs
        listOfOps.add(ZKUtilOp.deleteNodeFailSilent(deadRSZnodePath));
        LOG.debug(" The multi list size is: " + listOfOps.size());
        ZKUtil.multiOrSequential(this.zookeeper, listOfOps, false);
        LOG.info("Atomically moved the dead regionserver logs. ");
    } catch (KeeperException e) {
        // Multi call failed; it looks like some other regionserver took away the logs.
        LOG.warn("Got exception in copyQueuesFromRSUsingMulti: ", e);
        queues.clear();
    }
    return queues;
}

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From source file:org.codehaus.mojo.license.LicenseMap.java

public SortedMap<MavenProject, String[]> toDependencyMap() {
    SortedMap<MavenProject, Set<String>> tmp = new TreeMap<MavenProject, Set<String>>(
            ArtifactHelper.getProjectComparator());

    for (Map.Entry<String, SortedSet<MavenProject>> entry : entrySet()) {
        String license = entry.getKey();
        SortedSet<MavenProject> set = entry.getValue();
        for (MavenProject p : set) {
            Set<String> list = tmp.get(p);
            if (list == null) {
                list = new HashSet<String>();
                tmp.put(p, list);/*from ww  w.j ava2 s .co m*/
            }
            list.add(license);
        }
    }

    SortedMap<MavenProject, String[]> result = new TreeMap<MavenProject, String[]>(
            ArtifactHelper.getProjectComparator());
    for (Map.Entry<MavenProject, Set<String>> entry : tmp.entrySet()) {
        List<String> value = new ArrayList<String>(entry.getValue());
        Collections.sort(value);
        result.put(entry.getKey(), value.toArray(new String[value.size()]));
    }
    tmp.clear();
    return result;
}

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From source file:org.opencms.workplace.CmsWidgetDialogParameter.java

/**
 * Prepares this widget dialog parameter to be commited.<p>
 * /*from  w  ww .  j  a va2  s .co  m*/
 * This is required if the base type is mapped to a Collection object,
 * becasue the collection needs to be cleared before the new values are set.<p>
 */
public void prepareCommit() {

    if (m_baseCollection instanceof List) {
        List<?> list = (List<?>) m_baseCollection;
        list.clear();
    } else if (m_baseCollection instanceof SortedMap) {
        SortedMap<?, ?> map = (SortedMap<?, ?>) m_baseCollection;
        map.clear();
    }
}

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