lakshmi-manasa-g commented on a change in pull request #1259: SAMZA-2444:
JobModel save in CoordinatorStreamStore resulting flush for each message
URL: https://github.com/apache/samza/pull/1259#discussion_r371388096
##########
File path:
samza-core/src/main/java/org/apache/samza/coordinator/metadatastore/CoordinatorStreamStore.java
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@@ -155,6 +156,15 @@ public void delete(String namespacedKey) {
put(namespacedKey, null);
}
+ @Override
+ public void deleteAll(Collection<String> namespacedKeys) {
+ Map<String, byte[]> entries = new HashMap<>(namespacedKeys.size());
+ for (String namespacedKey : namespacedKeys) {
+ entries.put(namespacedKey, null);
+ }
+ putAll(entries);
Review comment:
this is not atomic right. cause, the`flush()` is when the entries are
guaranteed to be persisted on the coordinator stream and `putAll` does flush
only at the end of all `put`. So if this is the expectation, then the
MetadataStore interface should allow it.
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