2
我們想利用Spring集成2.1.1事務讀郵件關閉POP3郵箱。事務性是使我們可以閱讀電子郵件信息，並堅持到Oracle，並從郵箱中刪除。如果發生事務回滾，我們希望郵件保留在郵箱中（即不能刪除）。事務POP3郵箱的訪問與Spring集成
我們的問題是，儘管在一個事務是（在第二上更詳細地）在打開郵箱，郵件被檢索到，標記爲刪除與連接關閉該事務的其餘部分無關。這意味着已經太晚了，如果事情失敗以後（如關閉連接和郵箱已經進入更新狀態，其永久刪除電子郵件）不刪除郵件。
我們一直試圖通過創建事務輪詢入站通道適配器要做到這一點：
<!-- This inbound channel adaptor interfaces to the sendmail POP3 queue -->
<int-mail:inbound-channel-adapter id="pop3PollingChannelAdaptor"
store-uri="pop3://myuser:[email protected]/inbox"
channel="receiveInboundEmailChannel"
should-delete-messages="true"
auto-startup="true"
java-mail-properties="javaMailProperties">
<!-- Will poll every 20 seconds -->
<int:poller fixed-rate="10000"
max-messages-per-poll="1">
<int:transactional transaction-manager="txManager"
isolation="DEFAULT"
propagation="REQUIRED"
read-only="false"
timeout="100000" />
</int:poller>
</int-mail:inbound-channel-adapter>
這使對入站電子郵件渠道的消息：
這又聽了通過出站通道適配器（端點）：
<int:outbound-channel-adapter channel="receiveInboundEmailChannel"
ref="inboundEmailMessageEndpoint"
method="processMessage" />
端點的實現當前使事情變得非常簡單。我們不會去任何地方附近的一個數據庫的那一刻，而不是我們只是拋出一個異常，如果我們想觸發回滾。
@MessageEndpoint
public class InboundEmailMessageEndpoint {
@Transactional(propagation = Propagation.MANDATORY)
public void processMessage(Message<MimeMessage> message) {
MimeMessage mailMessage = message.getPayload();
// We throw exceptions here to cause a rollback if we need to during investigation...
}
}
縱觀所有的日誌中，我們可以看到我們的問題在上下文中（注意如何POP3「再見的」我們的工作在終點休息開始前，最重要的是，周圍的事務提交之前/卷返回）：
15:32:25.256 INFO [main][org.springframework.transaction.jta.JtaTransactionManager] Using JTA UserTransaction: [email protected]
15:32:25.256 INFO [main][org.springframework.transaction.jta.JtaTransactionManager] Using JTA TransactionManager: [email protected]
15:32:25.422 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.BaseTransactionManager] getCompositeTransaction() returning NULL!
15:32:25.422 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.BaseTransactionManager] getCompositeTransaction() returning NULL!
15:32:25.423 DEBUG [task-scheduler-1][org.springframework.transaction.jta.JtaTransactionManager] Creating new transaction with name [org.springframework.integration.endpoint.AbstractPollingEndpoint$1.call]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT,timeout_100000
15:32:25.423 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.BaseTransactionManager] getCompositeTransaction() returning NULL!
15:32:25.423 WARN [task-scheduler-1][com.atomikos.icatch.imp.TransactionServiceImp] Attempt to create a transaction with a timeout that exceeds com.atomikos.icatch.max_timeout - truncating to: 300000
15:32:25.423 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.CoordinatorImp] Coordinator 10.9.21.7.tm0000100022 entering state: ACTIVE
15:32:25.425 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.thread.TaskManager] TaskManager: initializing...
15:32:25.426 INFO [task-scheduler-1][com.atomikos.icatch.imp.thread.TaskManager] THREADS: using JDK thread pooling...
15:32:25.428 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.thread.TaskManager] THREADS: using executor class com.atomikos.icatch.imp.thread.Java15ExecutorFactory$Executor
15:32:25.428 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.thread.Java15ExecutorFactory] (1.5) executing task: [email protected]
15:32:25.429 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.thread.ThreadFactory] ThreadFactory: creating new thread: Atomikos:0
15:32:25.429 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.TransactionServiceImp] Creating composite transaction: 10.9.21.7.tm0000100022
15:32:25.433 INFO [task-scheduler-1][com.atomikos.icatch.imp.BaseTransactionManager] createCompositeTransaction (100000000): created new ROOT transaction with id 10.9.21.7.tm0000100022
DEBUG: JavaMail version 1.4.4
DEBUG: successfully loaded resource: /META-INF/javamail.default.providers
DEBUG: Tables of loaded providers
DEBUG: Providers Listed By Class Name: {com.sun.mail.smtp.SMTPSSLTransport=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Sun Microsystems, Inc], com.sun.mail.smtp.SMTPTransport=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc], com.sun.mail.imap.IMAPSSLStore=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Sun Microsystems, Inc], com.sun.mail.pop3.POP3SSLStore=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Sun Microsystems, Inc], com.sun.mail.imap.IMAPStore=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc], com.sun.mail.pop3.POP3Store=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Sun Microsystems, Inc]}
DEBUG: Providers Listed By Protocol: {imaps=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Sun Microsystems, Inc], imap=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc], smtps=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Sun Microsystems, Inc], pop3=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Sun Microsystems, Inc], pop3s=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Sun Microsystems, Inc], smtp=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]}
DEBUG: successfully loaded resource: /META-INF/javamail.default.address.map
DEBUG: getProvider() returning javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Sun Microsystems, Inc]
DEBUG POP3: mail.pop3.rsetbeforequit: false
DEBUG POP3: mail.pop3.disabletop: false
DEBUG POP3: mail.pop3.forgettopheaders: false
DEBUG POP3: mail.pop3.cachewriteto: false
DEBUG POP3: mail.pop3.filecache.enable: false
DEBUG POP3: mail.pop3.keepmessagecontent: false
DEBUG POP3: mail.pop3.starttls.enable: false
DEBUG POP3: mail.pop3.starttls.required: false
15:32:25.446 DEBUG [task-scheduler-1][org.springframework.integration.mail.Pop3MailReceiver] connecting to store [pop3://devmail9:*****@100.100.100.100/inbox]
DEBUG POP3: mail.pop3.apop.enable: false
DEBUG POP3: mail.pop3.disablecapa: false
DEBUG POP3: connecting to host "100.100.100.100", port 110, isSSL false
S: +OK POP3 xxxxx.xxxx.xxxx.xxx.xxx.uk v4.39 server ready
C: CAPA
S: -ERR Unknown command in AUTHORIZATION state
C: USER myuser
S: +OK User name accepted, password please
C: PASS myuser
S: +OK Mailbox open, 3 messages
15:32:25.564 DEBUG [task-scheduler-1][org.springframework.integration.mail.Pop3MailReceiver] opening folder [pop3://myuser:*****@100.100.100.100/inbox]
C: STAT
S: +OK 3 5956
15:32:25.569 INFO [task-scheduler-1][org.springframework.integration.mail.Pop3MailReceiver] attempting to receive mail from folder [inbox]
C: NOOP
S: +OK No-op to you too!
15:32:25.591 DEBUG [task-scheduler-1][org.springframework.integration.mail.Pop3MailReceiver] found 1 new messages
C: TOP 1 0
S: +OK Top of message follows
Received: from xxxxx.xxxx.xxxx.xxx.xxx.uk ([100.100.100.100]) by xxxxx.xxxx.xxxx.xxx.xxx.uk (AIX5.2/8.11.6p2/8.11.0) with ESMTP id q57EUrG1544330 for C: LIST 1
....
S: +OK 1 1996
15:32:25.604 DEBUG [task-scheduler-1][org.springframework.integration.mail.Pop3MailReceiver] Recieved 1 messages
15:32:26.097 DEBUG [task-scheduler-1][org.springframework.integration.mail.Pop3MailReceiver] USER flags are not supported by this mail server. Flagging message with system flag
DEBUG POP3: streaming msg 1
C: RETR 1
S: +OK 1996 octets
Received: from xxxxx.xxxx.xxxx.xxx.xxx.uk ([100.100.100.100]) by GLA610.crown.copfs.gsi.gov.uk (AIX5.2/8.11.6p2/8.11.0) with ESMTP id q57EUrG1544330 for <[email protected]>; Thu, 7 Jun 2012 15:30:53 +0100
....
DEBUG POP3: streaming msg 1
C: RETR 1
S: +OK 1996 octets
Received: from xxxxx.xxxx.xxxx.xxx.xxx.uk ([100.100.100.100]) by xxxxx.xxxx.xxxx.xxx.xxx.uk (AIX5.2/8.11.6p2/8.11.0) with ESMTP id q57EUrG1544330 for <[email protected]>; Thu, 7 Jun 2012 15:30:53 +0100
....
.
C: NOOP
S: +OK No-op to you too!
C: DELE 1
S: +OK Message deleted
C: QUIT
S: +OK Sayonara
15:32:26.672 DEBUG [task-scheduler-1][org.springframework.integration.mail.MailReceivingMessageSource] received mail message [[email protected]]
15:32:26.696 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.BaseTransactionManager] getCompositeTransaction() returning instance with id 10.9.21.7.tm0000100022
15:32:26.697 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.BaseTransactionManager] getCompositeTransaction() returning instance with id 10.9.21.7.tm0000100022
15:32:26.697 DEBUG [task-scheduler-1][org.springframework.transaction.jta.JtaTransactionManager] Participating in existing transaction
15:32:26.716 INFO [task-scheduler-1][xx.xxx.xxx.xxx.channel.email.InboundEmailMessageEndpoint] In InboundEmailMessageEndpoint. processing MailMessage (Subject): 7777777777777777777
15:32:26.735 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.BaseTransactionManager] getCompositeTransaction() returning instance with id 10.9.21.7.tm0000100022
15:32:26.735 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.BaseTransactionManager] getCompositeTransaction() returning instance with id 10.9.21.7.tm0000100022
15:32:26.735 DEBUG [task-scheduler-1][org.springframework.transaction.jta.JtaTransactionManager] Initiating transaction commit
15:32:26.735 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.BaseTransactionManager] getCompositeTransaction() returning instance with id 10.9.21.7.tm0000100022
15:32:26.735 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.BaseTransactionManager] getCompositeTransaction() returning instance with id 10.9.21.7.tm0000100022
15:32:26.735 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.BaseTransactionManager] getCompositeTransaction() returning instance with id 10.9.21.7.tm0000100022
15:32:26.735 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.BaseTransactionManager] getCompositeTransaction() returning instance with id 10.9.21.7.tm0000100022
15:32:26.736 INFO [task-scheduler-1][com.atomikos.icatch.imp.CompositeTransactionImp] commit() done (by application) of transaction 10.9.21.7.tm0000100022
15:32:26.736 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.CoordinatorImp] Coordinator 10.9.21.7.tm0000100022 entering state: COMMITTING
15:32:26.740 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.CoordinatorImp] Coordinator 10.9.21.7.tm0000100022 entering state: TERMINATED
15:32:26.741 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.CoordinatorImp] Coordinator 10.9.21.7.tm0000100022 : stopping timer...
15:32:26.741 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.CoordinatorImp] Coordinator 10.9.21.7.tm0000100022 : disposing statehandler TERMINATED...
15:32:26.741 DEBUG [task-scheduler-1][com.atomikos.icatch.imp.CoordinatorImp] Coordinator 10.9.21.7.tm0000100022 : disposed.