jiajunwang commented on a change in pull request #849: Add REST APIs for get,
set, update RestConfig
URL: https://github.com/apache/helix/pull/849#discussion_r388119405
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File path: helix-core/src/main/java/org/apache/helix/ConfigAccessor.java
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@@ -605,6 +606,45 @@ public RESTConfig getRESTConfig(String clusterName) {
return new RESTConfig(record);
}
+ /**
+ * Set RestConfig of a given cluster
+ * @param clusterName the cluster id
+ * @param restConfig the RestConfig to be set to the cluster
+ */
+ public void setRESTConfig(String clusterName, RESTConfig restConfig) {
+ updateRESTConfig(clusterName, restConfig, true);
+ }
+
+ /**
+ * Update RestConfig of a given cluster
+ * @param clusterName the cluster id
+ * @param restConfig the new RestConfig to be set to the cluster
+ */
+ public void updateRESTConfig(String clusterName, RESTConfig restConfig) {
+ updateRESTConfig(clusterName, restConfig, false);
+ }
+
+ private void updateRESTConfig(String clusterName, RESTConfig restConfig,
boolean overwrite) {
+ if (!ZKUtil.isClusterSetup(clusterName, _zkClient)) {
+ throw new HelixException("fail to update REST config. cluster: " +
clusterName + " is NOT setup.");
+ }
+
+ HelixConfigScope scope = new
HelixConfigScopeBuilder(ConfigScopeProperty.REST).forCluster(clusterName).build();
+ String zkPath = scope.getZkPath();
+
+ // Create "/{clusterId}/CONFIGS/REST" if it does not exist
+ String parentPath = HelixUtil.getZkParentPath(zkPath);
+ if (!_zkClient.exists(HelixUtil.getZkParentPath(zkPath))) {
+ ZKUtil.createOrMerge(_zkClient, parentPath, new ZNRecord(parentPath),
true, true);
+ }
+
+ if (overwrite) {
Review comment:
Actually, if it is "overwrite", there is no need to check existence. Just
call createOrReplace().
If it is not "overwrite", there is no need to check existence either, just
call createOrUpdate().
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