Mercurial > hg > Members > tatsuki > bbs
view src/main/java/jp/ac/u_ryukyu/ie/cr/bbs/network/bbs/BulletinBoardJungleManager.java @ 9:2890ae6b1aef
network browsing
author | tatsuki |
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date | Fri, 03 Feb 2017 02:16:51 +0900 |
parents | 766f7668521f |
children |
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package jp.ac.u_ryukyu.ie.cr.bbs.network.bbs; import jp.ac.u_ryukyu.ie.cr.jungle.DefaultJungle; import jp.ac.u_ryukyu.ie.cr.jungle.Jungle; import jp.ac.u_ryukyu.ie.cr.jungle.store.nodepath.DefaultNodePath; import jp.ac.u_ryukyu.ie.cr.jungle.store.nodepath.NodePath; import jp.ac.u_ryukyu.ie.cr.jungle.transaction.editor.jungleTreeEditor.JungleTreeEditor; import jp.ac.u_ryukyu.ie.cr.jungle.transaction.node.TreeNode; import jp.ac.u_ryukyu.ie.cr.jungle.tree.JungleTree; import jp.ac.u_ryukyu.ie.cr.jungle.util.Either; import jp.ac.u_ryukyu.ie.cr.jungle.util.Error.Error; import jp.ac.u_ryukyu.ie.cr.jungleNetwork.operations.NetworkTreeOperationLog; import jp.ac.u_ryukyu.ie.cr.jungleNetwork.transaction.JungleUpdater; import java.nio.ByteBuffer; import java.util.concurrent.atomic.AtomicInteger; public class BulletinBoardJungleManager { private static BulletinBoardJungleManager instance = new BulletinBoardJungleManager(); private Jungle jungle; private static AtomicInteger requestCounter = new AtomicInteger(0); private BulletinBoardJungleManager() { jungle = new DefaultJungle(null,"default"); } public static int requestGetAndIncrement() { return requestCounter.getAndIncrement(); } public static int requestIncrementAndGet() { return requestCounter.incrementAndGet(); } public static BulletinBoardJungleManager getInstantce() { return instance; } public static void setJungle(Jungle _j) { instance.jungle = _j; } public static AtomicInteger getRequestCounter() { return requestCounter; } public static Jungle getJungle() { return instance.jungle; } public static JungleTree createNewTree(String name) { return instance.jungle.createNewTree(name); } public static Either<Error, JungleTreeEditor> update(NetworkTreeOperationLog netLog) { String treeName = netLog.getTreeName(); Jungle jungle = BulletinBoardJungleManager.getJungle(); if (jungle.getTreeByName(treeName) == null) { if(null == jungle.createNewTree(treeName)){ throw new IllegalStateException(); } } Either<Error, JungleTreeEditor> either = null; JungleTree tree = jungle.getTreeByName(treeName); long timestamp = System.currentTimeMillis(); ByteBuffer tBuffer = ByteBuffer.allocate(16); NodePath root = new DefaultNodePath(); tBuffer.putLong(timestamp); do { JungleTreeEditor editor = tree.getJungleTreeEditor(); /* * Merge. * posが使われていない * calculatePositionは何をしているのだろうか? */ int pos = calculatePosition(tree.getRootNode(), netLog.getTimeStamp()); either = JungleUpdater.edit(editor, netLog, pos); if(either.isA()) { throw new IllegalStateException(); } editor = either.b(); either = editor.putAttribute(root, "renewtime", tBuffer); if(either.isA()) { throw new IllegalStateException(); } editor = either.b(); either = editor.success(); }while(either.isA()); requestIncrementAndGet(); return either; } private static int calculatePosition(TreeNode node, long newNodeTimeStamp) { int count = 0; long childTimeStamp = 0; for(TreeNode n : node.getChildren()) { ByteBuffer timestamp = n.getAttributes().get("timestamp"); if(timestamp == null) { return count; } childTimeStamp = timestamp.getLong(0); if (newNodeTimeStamp < childTimeStamp) { break; } count++; } return count; } }