Java tutorial
/** * Copyright (C) 2010 EdgyTech LLC. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.edgytech.umongo; import com.edgytech.swingfast.EnumListener; import com.edgytech.swingfast.FormDialog; import com.edgytech.swingfast.InfoDialog; import com.edgytech.swingfast.XmlComponentUnit; import com.mongodb.BasicDBObject; import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.DBCursor; import com.mongodb.DBObject; import com.mongodb.Mongo; import com.mongodb.ServerAddress; import com.mongodb.WriteConcern; import java.io.IOException; import java.net.UnknownHostException; import java.util.ArrayList; import java.util.Date; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.concurrent.atomic.AtomicInteger; import java.util.logging.Level; import javax.swing.JPanel; import org.bson.types.BSONTimestamp; import org.bson.types.MaxKey; import org.bson.types.MinKey; import com.edgytech.umongo.RouterPanel.Item; import com.edgytech.swingfast.*; import com.mongodb.*; /** * * @author antoine */ public class RouterPanel extends BasePanel implements EnumListener<Item> { enum Item { refresh, host, address, shards, listShards, flushConfiguration, addShard, asHost, asShardName, asReplSetName, asMaxSize, removeShard, rsShard, balancer, balStopped, balSecThrottle, balStartTime, balStopTime, regenConfigDB, regenServers, regenDB, regenCollection, regenShardKey, regenKeyUnique, regenRSList, regenRSListArea, regenDeleteChunks, regenConfirm } public RouterPanel() { setEnumBinding(Item.values(), this); } RouterNode getRouterNode() { return (RouterNode) node; } @Override protected void updateComponentCustom(JPanel comp) { try { ServerAddress addr = getRouterNode().getAddress(); setStringFieldValue(Item.host, addr.getHost() + ":" + addr.getPort()); setStringFieldValue(Item.address, addr.getSocketAddress().toString()); ((DocField) getBoundUnit(Item.shards)).setDoc(((RouterNode) node).shards); } catch (Exception e) { UMongo.instance.showError(this.getClass().getSimpleName() + " update", e); } } public void actionPerformed(Item enm, XmlComponentUnit unit, Object src) { } public void addShard(ButtonBase button) { final RouterNode router = getRouterNode(); final String host = getStringFieldValue(Item.asHost); final String shardName = getStringFieldValue(Item.asShardName); final String replSetName = getStringFieldValue(Item.asReplSetName); final int maxsize = getIntFieldValue(Item.asMaxSize); String server = host; if (!replSetName.isEmpty()) server = replSetName + "/" + server; final BasicDBObject cmd = new BasicDBObject("addshard", server); if (!shardName.isEmpty()) cmd.put("name", shardName); if (maxsize > 0) cmd.put("maxSize", maxsize); final DB db = router.getMongoClient().getDB("admin"); new DbJobCmd(db, cmd, this, null).addJob(); } public void removeShard(ButtonBase button) { FormDialog dialog = (FormDialog) ((MenuItem) getBoundUnit(Item.removeShard)).getDialog(); ComboBox combo = (ComboBox) getBoundUnit(Item.rsShard); combo.value = 0; combo.items = getRouterNode().getShardNames(); combo.structureComponent(); if (!dialog.show()) return; final BasicDBObject cmd = new BasicDBObject("removeshard", getStringFieldValue(Item.rsShard)); final DB db = getRouterNode().getMongoClient().getDB("admin"); new DbJobCmd(db, cmd, this, null).addJob(); } public void listShards(ButtonBase button) { new DbJobCmd(getRouterNode().getMongoClient().getDB("admin"), "listShards").addJob(); } public void flushConfiguration(ButtonBase button) { new DbJobCmd(getRouterNode().getMongoClient().getDB("admin"), "flushRouterConfig").addJob(); } public void balancer(ButtonBase button) { final MongoClient mongo = getRouterNode().getMongoClient(); final DB config = mongo.getDB("config"); final DBCollection settings = config.getCollection("settings"); FormDialog diag = (FormDialog) ((MenuItem) getBoundUnit(Item.balancer)).getDialog(); diag.xmlLoadCheckpoint(); final BasicDBObject query = new BasicDBObject("_id", "balancer"); BasicDBObject balDoc = (BasicDBObject) settings.findOne(query); if (balDoc != null) { if (balDoc.containsField("stopped")) setIntFieldValue(Item.balStopped, balDoc.getBoolean("stopped") ? 1 : 2); if (balDoc.containsField("_secondaryThrottle")) setIntFieldValue(Item.balSecThrottle, balDoc.getBoolean("_secondaryThrottle") ? 1 : 2); BasicDBObject window = (BasicDBObject) balDoc.get("activeWindow"); if (window != null) { setStringFieldValue(Item.balStartTime, window.getString("start")); setStringFieldValue(Item.balStopTime, window.getString("stop")); } } if (!diag.show()) return; if (balDoc == null) balDoc = new BasicDBObject("_id", "balancer"); int stopped = getIntFieldValue(Item.balStopped); if (stopped > 0) balDoc.put("stopped", stopped == 1 ? true : false); else balDoc.removeField("stopped"); int throttle = getIntFieldValue(Item.balSecThrottle); if (throttle > 0) balDoc.put("_secondaryThrottle", throttle == 1 ? true : false); else balDoc.removeField("_secondaryThrottle"); if (!getStringFieldValue(Item.balStartTime).trim().isEmpty()) { BasicDBObject aw = new BasicDBObject(); aw.put("start", getStringFieldValue(Item.balStartTime).trim()); aw.put("stop", getStringFieldValue(Item.balStopTime).trim()); balDoc.put("activeWindow", aw); } final BasicDBObject newDoc = balDoc; new DbJob() { @Override public Object doRun() throws IOException { return settings.update(query, newDoc, true, false); } @Override public String getNS() { return settings.getFullName(); } @Override public String getShortName() { return "Balancer"; } @Override public void wrapUp(Object res) { updateComponent(); super.wrapUp(res); } }.addJob(); } public void regenConfigDB(ButtonBase button) throws UnknownHostException { MongoClient cmongo = getRouterNode().getMongoClient(); String servers = getStringFieldValue(Item.regenServers); final String db = getStringFieldValue(Item.regenDB); final String col = getStringFieldValue(Item.regenCollection); final String ns = db + "." + col; final DBObject shardKey = ((DocBuilderField) getBoundUnit(Item.regenShardKey)).getDBObject(); final boolean unique = getBooleanFieldValue(Item.regenKeyUnique); final BasicDBObject result = new BasicDBObject(); result.put("ns", ns); result.put("shardKey", shardKey); result.put("unique", unique); // create direct mongo for each replica set String[] serverList = servers.split("\n"); List<ServerAddress> list = new ArrayList<ServerAddress>(); String txt = ""; String primaryShard = null; final BasicDBObject shardList = new BasicDBObject(); HashMap<MongoClient, String> mongoToShard = new HashMap<MongoClient, String>(); sLoop: for (String server : serverList) { server = server.trim(); String[] tokens = server.split("/"); if (tokens.length != 2) { new InfoDialog(null, "Error", null, "Server format must be like 'hostname:port/shard', one by line") .show(); return; } server = tokens[0]; String shard = tokens[1]; if (primaryShard == null) { primaryShard = shard; } ServerAddress addr = new ServerAddress(server); // filter out if replset already exists for (MongoClient replset : mongoToShard.keySet()) { if (replset.getServerAddressList().contains(addr)) { continue sLoop; } } list.clear(); list.add(addr); MongoClient mongo = new MongoClient(list); // UMongo.instance.addMongoClient(mongo, null); // make request to force server detection mongo.getDatabaseNames(); mongoToShard.put(mongo, shard); String desc = null; if (!mongo.getDatabaseNames().contains(db) || !mongo.getDB(db).getCollectionNames().contains(col)) { desc = "Collection not present!"; } else { // try to see if shard key has index DBObject index = mongo.getDB(db).getCollection("system.indexes") .findOne(new BasicDBObject("key", shardKey)); if (index != null) { desc = "shard key found"; } else { desc = "shard key NOT found!"; } } txt += mongo.toString() + " shard=" + shard + " - " + desc + "\n"; BasicDBObject shardObj = new BasicDBObject("servers", mongo.toString()); shardObj.put("status", desc); if (shardList.containsField(shard)) { new InfoDialog(null, "Error", null, "Duplicate Shard name " + shard).show(); return; } shardList.put(shard, shardObj); } result.put("shards", shardList); FormDialog dia = (FormDialog) getBoundUnit(Item.regenRSList); dia.setStringFieldValue(Item.regenRSListArea, txt); if (!dia.show()) { return; } DB config = cmongo.getDB("config"); // add database record BasicDBObject doc = new BasicDBObject("_id", db); doc.put("partitioned", true); doc.put("primary", primaryShard); config.getCollection("databases").save(doc); // add collection record doc = new BasicDBObject("_id", ns); doc.put("lastmod", new Date()); doc.put("dropped", false); doc.put("key", shardKey); doc.put("unique", unique); config.getCollection("collections").save(doc); final DBCollection chunks = config.getCollection("chunks"); long count = chunks.count(new BasicDBObject("ns", ns)); if (count > 0) { dia = (FormDialog) getBoundUnit(Item.regenDeleteChunks); if (dia.show()) { chunks.remove(new BasicDBObject("ns", ns)); } else { return; } } // add temp collection to sort chunks with shard key final DBCollection tmpchunks = config.getCollection("_tmpchunks_" + col); tmpchunks.drop(); // should be safe environment, and dup keys should be ignored tmpchunks.setWriteConcern(WriteConcern.NORMAL); // can use shardKey as unique _id // tmpchunks.ensureIndex(shardKey, "shardKey", true); // create filter for shard fields final DBObject shardKeyFilter = new BasicDBObject(); // final DBObject shardKeyDescend = new BasicDBObject(); boolean hasId = false; for (String key : shardKey.keySet()) { shardKeyFilter.put(key, 1); if (key.equals("_id")) { hasId = true; } } if (!hasId) { shardKeyFilter.put("_id", 0); } dia = (FormDialog) getBoundUnit(Item.regenConfirm); if (!dia.show()) { return; } // now fetch all records from each shard final AtomicInteger todo = new AtomicInteger(mongoToShard.size()); for (Map.Entry<MongoClient, String> entry : mongoToShard.entrySet()) { final MongoClient mongo = entry.getKey(); final String shard = entry.getValue(); new DbJob() { @Override public Object doRun() throws Exception { BasicDBObject shardObj = (BasicDBObject) shardList.get(shard); long count = mongo.getDB(db).getCollection(col).count(); shardObj.put("count", count); DBCursor cur = mongo.getDB(db).getCollection(col).find(new BasicDBObject(), shardKeyFilter); long i = 0; int inserted = 0; long start = System.currentTimeMillis(); while (cur.hasNext() && !isCancelled()) { BasicDBObject key = (BasicDBObject) cur.next(); setProgress((int) ((++i * 100.0f) / count)); try { BasicDBObject entry = new BasicDBObject("_id", key); entry.put("_shard", shard); tmpchunks.insert(entry); ++inserted; } catch (Exception e) { getLogger().log(Level.WARNING, e.getMessage(), e); } } if (isCancelled()) { shardObj.put("cancelled", true); } shardObj.put("inserted", inserted); shardObj.put("scanTime", System.currentTimeMillis() - start); todo.decrementAndGet(); return null; } @Override public String getNS() { return tmpchunks.getFullName(); } @Override public String getShortName() { return "Scanning " + shard; } @Override public boolean isDeterminate() { return true; } }.addJob(); } new DbJob() { @Override public Object doRun() throws Exception { // wait for all shards to be done long start = System.currentTimeMillis(); while (todo.get() > 0 && !isCancelled()) { Thread.sleep(2000); } if (isCancelled()) { result.put("cancelled", true); return result; } // find highest current timestamp DBCursor cur = chunks.find().sort(new BasicDBObject("lastmod", -1)).batchSize(-1); BasicDBObject chunk = (BasicDBObject) (cur.hasNext() ? cur.next() : null); BSONTimestamp ts = (BSONTimestamp) (chunk != null ? chunk.get("lastmod") : null); // now infer chunk ranges long count = tmpchunks.count(); result.put("uniqueKeys", count); int numChunks = 0; cur = tmpchunks.find().sort(new BasicDBObject("_id", 1)); BasicDBObject prev = (BasicDBObject) cur.next(); BasicDBObject next = null; // snap prev to minkey BasicDBObject theid = (BasicDBObject) prev.get("_id"); for (String key : shardKey.keySet()) { theid.put(key, new MinKey()); } String currentShard = prev.getString("_shard"); int i = 1; while (cur.hasNext()) { next = (BasicDBObject) cur.next(); setProgress((int) ((++i * 100.0f) / count)); String newShard = next.getString("_shard"); if (newShard.equals(currentShard)) continue; // add chunk ts = getNextTimestamp(ts); chunk = getChunk(ns, shardKey, prev, next, ts); chunks.insert(chunk); prev = next; currentShard = prev.getString("_shard"); ++numChunks; } // build max next = new BasicDBObject(); for (String key : shardKey.keySet()) { next.put(key, new MaxKey()); } next = new BasicDBObject("_id", next); ts = getNextTimestamp(ts); chunk = getChunk(ns, shardKey, prev, next, ts); chunks.insert(chunk); ++numChunks; result.put("numChunks", numChunks); result.put("totalTime", System.currentTimeMillis() - start); return result; } @Override public String getNS() { return chunks.getFullName(); } @Override public String getShortName() { return "Creating Chunks"; } @Override public boolean isDeterminate() { return true; } }.addJob(); } BasicDBObject getChunk(String ns, DBObject shardKey, BasicDBObject min, BasicDBObject max, BSONTimestamp ts) { BasicDBObject chunk = new BasicDBObject(); BasicDBObject themin = (BasicDBObject) min.get("_id"); BasicDBObject themax = (BasicDBObject) max.get("_id"); String _id = ns; for (String key : shardKey.keySet()) { _id += "-" + key + "_"; Object val = themin.get(key); _id += (val != null ? val.toString() : "null"); } chunk.put("_id", _id); chunk.put("lastmod", ts); chunk.put("ns", ns); chunk.put("min", themin); chunk.put("max", themax); chunk.put("shard", min.getString("_shard")); return chunk; } BSONTimestamp getNextTimestamp(BSONTimestamp ts) { if (ts == null) { return new BSONTimestamp(1000, 0); } return new BSONTimestamp(ts.getTime(), ts.getInc() + 1); } }