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https://issues.apache.org/jira/browse/SCB-149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16307731#comment-16307731
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ASF GitHub Bot commented on SCB-149:
------------------------------------
WillemJiang commented on a change in pull request #95: [SCB-149] service aware
callback
URL:
https://github.com/apache/incubator-servicecomb-saga/pull/95#discussion_r159177874
##########
File path:
alpha/alpha-core/src/main/java/io/servicecomb/saga/alpha/core/RetryOmegaCallback.java
##########
@@ -0,0 +1,71 @@
+/*
+ * 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 io.servicecomb.saga.alpha.core;
+
+import java.lang.invoke.MethodHandles;
+import java.util.concurrent.TimeUnit;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class RetryOmegaCallback implements OmegaCallback {
+ private static final Logger log =
LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
+ private static final String ERROR_MESSAGE = "Failed to compensate service
[{}] instance [{}] with method [{}], global tx id [{}] and local tx id [{}]";
+
+ private final OmegaCallback underlying;
+ private final int delay;
+
+ public RetryOmegaCallback(OmegaCallback underlying, int delay) {
+ this.underlying = underlying;
+ this.delay = delay;
+ }
+
+ @Override
+ public void compensate(TxEvent event) {
Review comment:
The calling thread is blocked, we may need to think for another way to do it.
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> [pack] service/instance aware omega callback
> --------------------------------------------
>
> Key: SCB-149
> URL: https://issues.apache.org/jira/browse/SCB-149
> Project: Apache ServiceComb
> Issue Type: Improvement
> Components: Saga
> Reporter: Yin Xiang
> Assignee: Yin Xiang
>
> as a user, i want to compensate the service instance which initiated the
> sub-transaction, if it's reachable from alpha, so that i can have stateful
> service.
> if that service instance is not reachable, other service instances are
> allowed.
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