public void actionPerformed(ObjectOutputStream oos, Message msg) throws EventHandleException {
try {
/* get the handler of the ServerPeer */
ServerPeer serverpeer = (ServerPeer) gui.peer();
/* get the message body */
SPLeaveReplacementBody body = (SPLeaveReplacementBody) msg.getBody();
TreeNode treeNode = body.getTreeNode();
treeNode.setContent(body.getContent());
SPGeneralAction.saveData(body.getContent().getData());
treeNode.setStatus(TreeNode.ACTIVE);
treeNode.setRole(TreeNode.MASTER);
treeNode.addCoOwnerList(body.getPhysicalSender());
serverpeer.addListItem(treeNode);
SPGeneralAction.updateRotateRoutingTable(serverpeer, treeNode);
serverpeer.setActivateStablePosition(
new ActivateStablePosition(serverpeer, treeNode, ServerPeer.TIME_TO_STABLE_POSITION));
((ServerGUI) gui).updatePane(treeNode);
} catch (Exception e) {
e.printStackTrace();
throw new EventHandleException(
"Replace a super peer's position failure when it leaves network", e);
}
}
private void doLeaveAndReplace(
ServerPeer serverpeer, TreeNode treeNode, SPLeaveFindReplacementNodeBody body) {
Message result = null;
Head thead = new Head();
Body tbody = null, tbodyLeave = null;
try {
AdjacentNodeInfo adjacentInfo;
Vector<String> transferWorkList;
int i;
adjacentInfo =
new AdjacentNodeInfo(
treeNode.getParentNode().getPhysicalInfo(),
treeNode.getParentNode().getLogicalInfo());
transferWorkList =
SPGeneralAction.getTransferWorkList(
treeNode, treeNode.getParentNode().getLogicalInfo().toString());
/*
* send update adjacent request to its adjacent node,
* and leave request to its parent
*/
treeNode.getContent().setData(SPGeneralAction.loadData());
if ((treeNode.getLogicalInfo().getNumber() % 2) == 0) {
tbodyLeave =
new SPLeaveBody(
serverpeer.getPhysicalInfo(),
treeNode.getLogicalInfo(),
treeNode.getContent(),
treeNode.getRightAdjacentNode(),
true,
transferWorkList,
treeNode.getParentNode().getLogicalInfo());
if (treeNode.getRightAdjacentNode() != null) {
tbody =
new SPUpdateAdjacentLinkBody(
serverpeer.getPhysicalInfo(),
treeNode.getLogicalInfo(),
adjacentInfo,
false,
treeNode.getRightAdjacentNode().getLogicalInfo());
thead.setMsgType(MsgType.SP_UPDATE_ADJACENT_LINK.getValue());
result = new Message(thead, tbody);
serverpeer.sendMessage(treeNode.getRightAdjacentNode().getPhysicalInfo(), result);
}
} else {
tbodyLeave =
new SPLeaveBody(
serverpeer.getPhysicalInfo(),
treeNode.getLogicalInfo(),
treeNode.getContent(),
treeNode.getLeftAdjacentNode(),
false,
transferWorkList,
treeNode.getParentNode().getLogicalInfo());
if (treeNode.getLeftAdjacentNode() != null) {
tbody =
new SPUpdateAdjacentLinkBody(
serverpeer.getPhysicalInfo(),
treeNode.getLogicalInfo(),
adjacentInfo,
true,
treeNode.getLeftAdjacentNode().getLogicalInfo());
thead.setMsgType(MsgType.SP_UPDATE_ADJACENT_LINK.getValue());
result = new Message(thead, tbody);
serverpeer.sendMessage(treeNode.getLeftAdjacentNode().getPhysicalInfo(), result);
}
}
thead.setMsgType(MsgType.SP_LEAVE.getValue());
result = new Message(thead, tbodyLeave);
serverpeer.sendMessage(treeNode.getParentNode().getPhysicalInfo(), result);
/*
* notify its neighbor nodes
*/
RoutingTableInfo leftRoutingTable = treeNode.getLeftRoutingTable();
RoutingItemInfo temptInfo;
for (i = 0; i < leftRoutingTable.getTableSize(); i++) {
temptInfo = leftRoutingTable.getRoutingTableNode(i);
if (temptInfo != null) {
tbody =
new SPUpdateRoutingTableDirectlyBody(
serverpeer.getPhysicalInfo(),
treeNode.getLogicalInfo(),
null,
i,
true,
temptInfo.getLogicalInfo());
thead.setMsgType(MsgType.SP_UPDATE_ROUTING_TABLE_DIRECTLY.getValue());
result = new Message(thead, tbody);
serverpeer.sendMessage(temptInfo.getPhysicalInfo(), result);
}
}
RoutingTableInfo rightRoutingTable = treeNode.getRightRoutingTable();
for (i = 0; i < rightRoutingTable.getTableSize(); i++) {
temptInfo = rightRoutingTable.getRoutingTableNode(i);
if (temptInfo != null) {
tbody =
new SPUpdateRoutingTableDirectlyBody(
serverpeer.getPhysicalInfo(),
treeNode.getLogicalInfo(),
null,
i,
false,
temptInfo.getLogicalInfo());
thead.setMsgType(MsgType.SP_UPDATE_ROUTING_TABLE_DIRECTLY.getValue());
result = new Message(thead, tbody);
serverpeer.sendMessage(temptInfo.getPhysicalInfo(), result);
}
}
/*
* ready to replace
*/
tbody =
new SPLeaveFindReplacementNodeReplyBody(
serverpeer.getPhysicalInfo(), body.getLogicalRequester());
thead.setMsgType(MsgType.SP_LEAVE_FIND_REPLACEMENT_NODE_REPLY.getValue());
result = new Message(thead, tbody);
serverpeer.sendMessage(body.getPhysicalRequester(), result);
// 4. delete logical node
SPGeneralAction.deleteTreeNode(serverpeer, treeNode);
} catch (Exception e) {
e.printStackTrace();
}
}