public ClientSession createClientSession(IClientInfo client, String clientType) {
// Both OE and BB share the session file. Don't stomp an existing file.
if (client == null || !client.isConfigured()) {
throw new IllegalStateException("Client not configured.");
}
clientType = clientType == null ? "" : clientType;
ClientSession session = null;
String tmpName = null;
String targetName = null;
try {
File targetFile = getSessionFile(client.getLastActivationToken());
targetName = targetFile.getAbsolutePath();
if (targetFile.exists()) {
session = new ClientSession();
session.read(targetFile);
if (session.getLastActivationId() != client.getLastActivationId()
|| session.getUserId() != client.getUserId()) {
// Existing session file found but it's clearly not ours.
// A hash collision is improbable. If this occurs, its more likely to be a
// bug. We can't safely rewrite the session file because another client
// might later call getClientSession() and read our email.
// This is a support concern.
LogMessageGen lmg = new LogMessageGen();
lmg.setSubject("Found existing session, but the content is unexpected.");
lmg.param(LoggingConsts.FILENAME, targetFile.getAbsolutePath());
m_logCategory.error(lmg.toString());
throw new ClientServiceException("");
}
session.setActivationToken(client.getLastActivationToken());
} // targetFile already found.
if (session == null) {
UserAccount user = m_userService.getUserAccount(client.getCustomerId(), client.getUserId());
session = client.createSession(user);
// What if the BB and OE create a session at the same time?
// This ensures a unique filename.
// The client who does the last renameTo() below wins the race
// and that becomes the common session file.
tmpName = targetFile.getAbsolutePath() + "_tmp_" + clientType;
File tmpFile = new File(tmpName);
session.write(tmpFile);
// If 'targetFile' already exists it'll get clobbered.
// Makes the session targetFile generation atomic.
boolean ok = FileUtils.clobberingRename(tmpFile, targetFile);
if (!ok) {
throw new IOException("Rename failed");
}
} // need to create session.
} catch (Exception ex) {
if (ex instanceof ClientServiceException) {
// We already logged it.
throw (ClientServiceException) ex;
}
LogMessageGen lmg = new LogMessageGen();
lmg.setSubject("Unable to generate session file.");
lmg.param(LoggingConsts.USER_ID, client.getUserId());
lmg.param(LoggingConsts.TEMP_NAME, tmpName);
lmg.param(LoggingConsts.FILENAME, targetName);
m_logCategory.error(lmg.toString(), ex);
throw new ClientServiceException("");
}
return session;
}
