Fix projects cache eviction on Project.NameKey

Since Change-Id: Ifaebf2 the projects cache key has changed
its data type from String to Project.NameKey.
The rationale behind the breaking change is still unknown
because the commit message did not specify the reason;
however, the data type must change also in the multi-site
plugin cache eviction so that projects cache eviction
can be restored.

Bug: Issue 14254
Change-Id: Id1484b08c5bde59d8d36b4e70eef345822f0aadd

src/main/java/com/googlesource/gerrit/plugins/multisite/forwarder/GsonParser.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/multisite/forwarder/GsonParser.java b/src/main/java/com/googlesource/gerrit/plugins/multisite/forwarder/GsonParser.java
index 0bbdada..b69cb91 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/multisite/forwarder/GsonParser.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/multisite/forwarder/GsonParser.java
@@ -17,6 +17,7 @@
 import com.google.common.base.MoreObjects;
 import com.google.gerrit.entities.Account;
 import com.google.gerrit.entities.AccountGroup;
+import com.google.gerrit.entities.Project;
 import com.google.gerrit.server.events.EventGson;
 import com.google.gson.Gson;
 import com.google.gson.JsonElement;
@@ -46,6 +47,9 @@
       case Constants.GROUPS_MEMBERS:
         key = AccountGroup.uuid(jsonElement(json).getAsJsonObject().get("uuid").getAsString());
         break;
+      case Constants.PROJECTS:
+        key = Project.nameKey(jsonElement(json).getAsString());
+        break;
       case Constants.PROJECT_LIST:
         key = gson.fromJson(nullToEmpty(json).toString(), Object.class);
         break;

src/test/java/com/googlesource/gerrit/plugins/multisite/forwarder/GsonParserTest.java

diff --git a/src/test/java/com/googlesource/gerrit/plugins/multisite/forwarder/GsonParserTest.java b/src/test/java/com/googlesource/gerrit/plugins/multisite/forwarder/GsonParserTest.java
index 12bdb74..cb4a223 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/multisite/forwarder/GsonParserTest.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/multisite/forwarder/GsonParserTest.java
@@ -18,6 +18,7 @@
 
 import com.google.gerrit.entities.Account;
 import com.google.gerrit.entities.AccountGroup;
+import com.google.gerrit.entities.Project;
 import com.google.gerrit.server.events.EventGsonProvider;
 import com.google.gson.Gson;
 import com.googlesource.gerrit.plugins.multisite.cache.Constants;
@@ -51,9 +52,16 @@
   }
 
   @Test
+  public void projectNameKeyParse() {
+    Project.NameKey name = Project.nameKey("foo");
+    String json = gson.toJson(name);
+    assertThat(name).isEqualTo(gsonParser.fromJson(Constants.PROJECTS, json));
+  }
+
+  @Test
   public void stringParse() {
     String key = "key";
-    assertThat(key).isEqualTo(gsonParser.fromJson(Constants.PROJECTS, key));
+    assertThat(key).isEqualTo(gsonParser.fromJson("any-cache-with-string-key", key));
   }
 
   @Test