Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
JAMES-1877 Introduce a helper for working with MessagingException
- Loading branch information
Showing
2 changed files
with
200 additions
and
96 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
161 changes: 161 additions & 0 deletions
161
...in/java/org/apache/james/transport/mailets/remoteDelivery/EnhancedMessagingException.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Original file line | Diff line number | Diff line change |
|---|---|---|---|
| @@ -0,0 +1,161 @@ | |||
| /**************************************************************** | |||
| * Licensed to the Apache Software Foundation (ASF) under one * | |||
| * or more contributor license agreements. See the NOTICE file * | |||
| * distributed with this work for additional information * | |||
| * regarding copyright ownership. The ASF licenses this file * | |||
| * to you 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 org.apache.james.transport.mailets.remoteDelivery; | |||
|
|
|||
| import java.lang.reflect.InvocationTargetException; | |||
| import java.lang.reflect.Method; | |||
|
|
|||
| import javax.mail.MessagingException; | |||
| import javax.mail.internet.InternetAddress; | |||
|
|
|||
| import com.google.common.base.Function; | |||
| import com.google.common.base.Optional; | |||
| import com.google.common.base.Preconditions; | |||
|
|
|||
| public class EnhancedMessagingException { | |||
|
|
|||
| private final MessagingException messagingException; | |||
| private final Optional<Integer> returnCode; | |||
| private final Optional<Integer> nestedReturnCode; | |||
|
|
|||
| public EnhancedMessagingException(MessagingException messagingException) { | |||
| this.messagingException = messagingException; | |||
| this.returnCode = computeReturnCode(); | |||
| this.nestedReturnCode = computeNestedReturnCode(); | |||
| } | |||
|
|
|||
| public boolean hasReturnCode() { | |||
| return returnCode.isPresent(); | |||
| } | |||
|
|
|||
| public boolean hasNestedReturnCode() { | |||
| return nestedReturnCode.isPresent(); | |||
| } | |||
|
|
|||
| public boolean isServerError() { | |||
| return isServerError(returnCode) || isServerError(nestedReturnCode); | |||
| } | |||
|
|
|||
| private boolean isServerError(Optional<Integer> returnCode) { | |||
| return (returnCode.isPresent() | |||
| && returnCode.get() >= 500 | |||
| && returnCode.get() <= 599) | |||
| || messageIndicatesServerException(); | |||
| } | |||
|
|
|||
| private boolean messageIndicatesServerException() { | |||
| return Optional.fromNullable(messagingException.getMessage()) | |||
| .transform(startWith5()) | |||
| .or(false); | |||
| } | |||
|
|
|||
| private Function<String, Boolean> startWith5() { | |||
| return new Function<String, Boolean>() { | |||
| @Override | |||
| public Boolean apply(String input) { | |||
| return input.startsWith("5"); | |||
| } | |||
| }; | |||
| } | |||
|
|
|||
| private Optional<Integer> computeReturnCode() { | |||
| if (messagingException.getClass().getName().endsWith(".SMTPSendFailedException") | |||
| || messagingException.getClass().getName().endsWith(".SMTPAddressSucceededException")) { | |||
| try { | |||
| return Optional.of ((Integer) invokeGetter(messagingException, "getReturnCode")); | |||
| } catch (ClassCastException cce) { | |||
| } catch (IllegalArgumentException iae) { | |||
| } catch (IllegalStateException ise) { | |||
| } | |||
| } | |||
| return Optional.absent(); | |||
| } | |||
|
|
|||
| public Optional<String> computeCommand() { | |||
| if (hasReturnCode()) { | |||
| try { | |||
| return Optional.of((String) invokeGetter(messagingException, "getCommand")); | |||
| } catch (ClassCastException cce) { | |||
| } catch (IllegalArgumentException iae) { | |||
| } catch (IllegalStateException ise) { | |||
| } | |||
| } | |||
| return Optional.absent(); | |||
| } | |||
|
|
|||
| public Optional<InternetAddress> computeAddress() { | |||
| if (hasReturnCode()) { | |||
| try { | |||
| return Optional.of((InternetAddress) invokeGetter(messagingException, "getAddress")); | |||
| } catch (ClassCastException cce) { | |||
| } catch (IllegalArgumentException iae) { | |||
| } catch (IllegalStateException ise) { | |||
| } | |||
| } | |||
| return Optional.absent(); | |||
| } | |||
|
|
|||
| public String computeAction() { | |||
| return messagingException.getClass().getName().endsWith(".SMTPAddressFailedException") ? "FAILED" : "SUCCEEDED"; | |||
| } | |||
|
|
|||
| public Optional<Integer> getReturnCode() { | |||
| return returnCode; | |||
| } | |||
|
|
|||
| private Optional<Integer> computeNestedReturnCode() { | |||
| EnhancedMessagingException currentMessagingException = this; | |||
| while (true) { | |||
| Optional<Integer> returnCode = currentMessagingException.computeReturnCode(); | |||
| if (returnCode.isPresent()) { | |||
| return returnCode; | |||
| } | |||
| if (currentMessagingException.hasNestedMessagingException()) { | |||
| currentMessagingException = currentMessagingException.getNestedMessagingException(); | |||
| } else { | |||
| return Optional.absent(); | |||
| } | |||
| } | |||
| } | |||
|
|
|||
| private boolean hasNestedMessagingException() { | |||
| return messagingException.getNextException() != null | |||
| && messagingException.getNextException() instanceof MessagingException; | |||
| } | |||
|
|
|||
| private EnhancedMessagingException getNestedMessagingException() { | |||
| Preconditions.checkState(hasNestedMessagingException()); | |||
| return new EnhancedMessagingException((MessagingException) messagingException.getNextException()); | |||
| } | |||
|
|
|||
| private Object invokeGetter(Object target, String getter) { | |||
| try { | |||
| Method getAddress = target.getClass().getMethod(getter); | |||
| return getAddress.invoke(target); | |||
| } catch (NoSuchMethodException nsme) { | |||
| // An SMTPAddressFailedException with no getAddress method. | |||
| } catch (IllegalAccessException iae) { | |||
| } catch (IllegalArgumentException iae) { | |||
| } catch (InvocationTargetException ite) { | |||
| // Other issues with getAddress invokation. | |||
| } | |||
| return new IllegalStateException("Exception invoking " + getter + " on a " + target.getClass() + " object"); | |||
| } | |||
| } | |||