Github user redsanket commented on a diff in the pull request:
https://github.com/apache/storm/pull/845#discussion_r43959604
--- Diff:
storm-core/src/jvm/backtype/storm/blobstore/BlobStoreAclHandler.java ---
@@ -0,0 +1,382 @@
+/**
+ * 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 backtype.storm.blobstore;
+
+import backtype.storm.Config;
+import backtype.storm.generated.AccessControl;
+import backtype.storm.generated.AccessControlType;
+import backtype.storm.generated.AuthorizationException;
+import backtype.storm.generated.SettableBlobMeta;
+import backtype.storm.security.auth.AuthUtils;
+import backtype.storm.security.auth.IPrincipalToLocal;
+import backtype.storm.security.auth.NimbusPrincipal;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.security.auth.Subject;
+import java.security.Principal;
+import java.util.*;
+
+/**
+ * Provides common handling of acls for Blobstores.
+ * Also contains some static utility functions related to Blobstores.
+ */
+public class BlobStoreAclHandler {
+ public static final Logger LOG =
LoggerFactory.getLogger(BlobStoreAclHandler.class);
+ private final IPrincipalToLocal _ptol;
+
+ public static final int READ = 0x01;
+ public static final int WRITE = 0x02;
+ public static final int ADMIN = 0x04;
+ public static final List<AccessControl> WORLD_EVERYTHING =
+ Arrays.asList(new AccessControl(AccessControlType.OTHER, READ |
WRITE | ADMIN));
+ public static final List<AccessControl> DEFAULT = new
ArrayList<AccessControl>();
+ private Set<String> _supervisors;
+ private Set<String> _admins;
+
+ public BlobStoreAclHandler(Map conf) {
+ _ptol = AuthUtils.GetPrincipalToLocalPlugin(conf);
+ _supervisors = new HashSet<String>();
+ _admins = new HashSet<String>();
+ if (conf.containsKey(Config.NIMBUS_SUPERVISOR_USERS)) {
+
_supervisors.addAll((List<String>)conf.get(Config.NIMBUS_SUPERVISOR_USERS));
+ }
+ if (conf.containsKey(Config.NIMBUS_ADMINS)) {
+ _admins.addAll((List<String>)conf.get(Config.NIMBUS_ADMINS));
+ }
+ }
+
+ private static AccessControlType parseACLType(String type) {
+ if ("other".equalsIgnoreCase(type) || "o".equalsIgnoreCase(type)) {
+ return AccessControlType.OTHER;
+ } else if ("user".equalsIgnoreCase(type) ||
"u".equalsIgnoreCase(type)) {
+ return AccessControlType.USER;
+ }
+ throw new IllegalArgumentException(type+" is not a valid access
control type");
+ }
+
+ private static int parseAccess(String access) {
+ int ret = 0;
+ for (char c: access.toCharArray()) {
+ if ('r' == c) {
+ ret = ret | READ;
+ } else if ('w' == c) {
+ ret = ret | WRITE;
+ } else if ('a' == c) {
+ ret = ret | ADMIN;
+ } else if ('-' == c) {
+ //ignored
+ } else {
+ throw new IllegalArgumentException("");
+ }
+ }
+ return ret;
+ }
+
+ public static AccessControl parseAccessControl(String str) {
+ String[] parts = str.split(":");
+ String type = "other";
+ String name = "";
+ String access = "-";
+ if (parts.length > 3) {
+ throw new IllegalArgumentException("Don't know how to parse "+str+"
into an ACL value");
+ } else if (parts.length == 1) {
+ type = "other";
+ name = "";
+ access = parts[0];
+ } else if (parts.length == 2) {
+ type = "user";
+ name = parts[0];
+ access = parts[1];
+ } else if (parts.length == 3) {
+ type = parts[0];
+ name = parts[1];
+ access = parts[2];
+ }
+ AccessControl ret = new AccessControl();
+ ret.set_type(parseACLType(type));
+ ret.set_name(name);
+ ret.set_access(parseAccess(access));
+ return ret;
+ }
--- End diff --
Will document it in DISTCACHE.markdown
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