pkuwm commented on a change in pull request #855: Make ZkBaseDataAccessor
realm-aware
URL: https://github.com/apache/helix/pull/855#discussion_r391327397
##########
File path:
helix-core/src/main/java/org/apache/helix/manager/zk/ZkBaseDataAccessor.java
##########
@@ -102,28 +118,85 @@ public AccessResult() {
private static Logger LOG =
LoggerFactory.getLogger(ZkBaseDataAccessor.class);
- private final HelixZkClient _zkClient;
- // true if ZkBaseDataAccessor was instantiated with a HelixZkClient, false
otherwise
+ private final RealmAwareZkClient _zkClient;
+ // true if ZkBaseDataAccessor was instantiated with a RealmAwareZkClient,
false otherwise
// This is used for close() to determine how ZkBaseDataAccessor should close
the underlying
// ZkClient
private final boolean _usesExternalZkClient;
+ /**
+ * @deprecated it is recommended to use the builder constructor {@link
Builder}
+ * instead to avoid having to manually create and maintain a
RealmAwareZkClient
+ * outside of ZkBaseDataAccessor.
+ *
+ * @param zkClient A created RealmAwareZkClient
+ */
@Deprecated
- public ZkBaseDataAccessor(HelixZkClient zkClient) {
+ public ZkBaseDataAccessor(RealmAwareZkClient zkClient) {
if (zkClient == null) {
throw new NullPointerException("zkclient is null");
}
_zkClient = zkClient;
_usesExternalZkClient = true;
}
+ private ZkBaseDataAccessor(Builder builder) {
+ switch (builder.realmMode) {
+ case MULTI_REALM:
+ try {
+ if (builder.zkClientType == ZkClientType.DEDICATED) {
+ // Use a realm-aware dedicated zk client
+ _zkClient = DedicatedZkClientFactory.getInstance()
+ .buildZkClient(builder.realmAwareZkConnectionConfig,
+ builder.realmAwareZkClientConfig);
+ } else if (builder.zkClientType == ZkClientType.SHARED) {
+ // Use a realm-aware shared zk client
+ _zkClient = SharedZkClientFactory.getInstance()
+ .buildZkClient(builder.realmAwareZkConnectionConfig,
+ builder.realmAwareZkClientConfig);
+ } else {
Review comment:
@dasahcc This is a realm-aware shared ZkClient. Users could construct the
client with the sharding key on multi-realm mode.
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