mgao0 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_r390031783
##########
File path:
helix-rest/src/main/java/org/apache/helix/rest/server/resources/helix/ClusterAccessor.java
##########
@@ -511,6 +512,125 @@ public Response
removeClusterStateModelDefinition(@PathParam("clusterId") String
return OK();
}
+ @PUT
+ @Path("{clusterId}/restconfig")
+ public Response createClusterRESTConfig(@PathParam("clusterId") String
clusterId,
+ String content) {
+ ZNRecord record;
+ try {
+ record = toZNRecord(content);
+ } catch (IOException e) {
+ _logger.error("Failed to deserialize user's input " + content + ",
Exception: " + e);
+ return badRequest("Input is not a valid ZNRecord!");
+ }
+
+ if (!record.getId().equals(clusterId)) {
+ return badRequest("ID does not match the cluster name in input!");
+ }
+
+ RESTConfig config = new RESTConfig(record);
+ ConfigAccessor configAccessor = getConfigAccessor();
+ try {
+ configAccessor.setRESTConfig(clusterId, config);
+ } catch (HelixException ex) {
+ // TODO: Could use a more generic error for HelixException
+ return notFound(ex.getMessage());
+ } catch (Exception ex) {
+ _logger.error("Failed to create rest config, cluster " + clusterId + "
new config: " + content
+ + ", Exception: " + ex);
+ return serverError(ex);
+ }
+ return OK();
+ }
+
+ @POST
+ @Path("{clusterId}/restconfig")
+ public Response updateClusterRESTConfig(@PathParam("clusterId") String
clusterId,
+ @QueryParam("command") String commandStr, String content) {
+ Command command;
+ try {
+ command = getCommand(commandStr);
+ } catch (HelixException ex) {
+ return badRequest(ex.getMessage());
+ }
+
+ ZNRecord record;
+ try {
+ record = toZNRecord(content);
+ } catch (IOException e) {
+ _logger.error("Failed to deserialize user's input " + content + ",
Exception: " + e);
+ return badRequest("Input is not a valid ZNRecord!");
+ }
+
+ if (!record.getId().equals(clusterId)) {
+ return badRequest("ID does not match the cluster name in input!");
+ }
+
+ RESTConfig config = new RESTConfig(record);
+ ConfigAccessor configAccessor = getConfigAccessor();
+ try {
+ switch (command) {
+ case update:
+ configAccessor.updateRESTConfig(clusterId, config);
+ break;
+ case delete: {
+ HelixConfigScope scope =
+ new
HelixConfigScopeBuilder(HelixConfigScope.ConfigScopeProperty.REST)
+ .forCluster(clusterId).build();
+ configAccessor.remove(scope, config.getRecord());
+ }
+ break;
+ default:
+ return badRequest("Unsupported command " + commandStr);
+ }
+ } catch (HelixException ex) {
+ return notFound(ex.getMessage());
+ } catch (Exception ex) {
+ _logger.error(
+ "Failed to " + command + " rest config, cluster " + clusterId + "
new config: " + content
+ + ", Exception: " + ex);
+ return serverError(ex);
+ }
+ return OK();
+ }
+
+ @GET
+ @Path("{clusterId}/restconfig")
+ public Response getClusterRESTConfig(@PathParam("clusterId") String
clusterId) {
+ ConfigAccessor accessor = getConfigAccessor();
+ RESTConfig config = null;
Review comment:
I initialize the config to null mainly to check later if the accessor got
the config successfully. If there is an Exception, we catch these exceptions,
so by comparing if the config is null we know if there is error in fetching the
information.
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