Expand the access privilege of plugin classes.

Plugin and PluginGuiceEnvironment can be useful outside of its own
package, so expand the access privilege of their methods.

Change-Id: I9bbdd408c22b237247393131ccd0a0f9c766e637

gerrit-server/src/main/java/com/google/gerrit/server/plugins/JsPlugin.java

@@ -58,7 +58,7 @@ class JsPlugin extends Plugin {
   }
 
   @Override
-  void stop(PluginGuiceEnvironment env) {
+  protected void stop(PluginGuiceEnvironment env) {
     if (manager != null) {
       manager.stop();
       httpInjector = null;
@@ -83,7 +83,7 @@ class JsPlugin extends Plugin {
   }
 
   @Override
-  boolean canReload() {
+  protected boolean canReload() {
     return true;
   }
 

gerrit-server/src/main/java/com/google/gerrit/server/plugins/Plugin.java

@@ -130,9 +130,9 @@ public abstract class Plugin {
     return disabled;
   }
 
-  abstract void start(PluginGuiceEnvironment env) throws Exception;
+  protected abstract void start(PluginGuiceEnvironment env) throws Exception;
 
-  abstract void stop(PluginGuiceEnvironment env);
+  protected abstract void stop(PluginGuiceEnvironment env);
 
   public abstract PluginContentScanner getContentScanner();
 
@@ -168,7 +168,7 @@ public abstract class Plugin {
     return "Plugin [" + name + "]";
   }
 
-  abstract boolean canReload();
+  protected abstract boolean canReload();
 
   boolean isModified(Path jar) {
     return snapshot.lastModified() != lastModified(jar);

gerrit-server/src/main/java/com/google/gerrit/server/plugins/PluginGuiceEnvironment.java

@@ -145,7 +145,7 @@ public class PluginGuiceEnvironment {
         || (httpMaps != null && httpMaps.containsKey(type));
   }
 
-  Module getSysModule() {
+  public Module getSysModule() {
     return sysModule;
   }
 
@@ -210,15 +210,15 @@ public class PluginGuiceEnvironment {
     return httpGen.get();
   }
 
-  RequestContext enter(Plugin plugin) {
+  public RequestContext enter(Plugin plugin) {
     return local.setContext(new PluginRequestContext(plugin.getPluginUser()));
   }
 
-  void exit(RequestContext old) {
+  public void exit(RequestContext old) {
     local.setContext(old);
   }
 
-  void onStartPlugin(Plugin plugin) {
+  public void onStartPlugin(Plugin plugin) {
     RequestContext oldContext = enter(plugin);
     try {
       attachItem(sysItems, plugin.getSysInjector(), plugin);

gerrit-server/src/main/java/com/google/gerrit/server/plugins/ServerPlugin.java

@@ -151,7 +151,7 @@ public class ServerPlugin extends Plugin {
   }
 
   @Override
-  boolean canReload() {
+  protected boolean canReload() {
     Attributes main = manifest.getMainAttributes();
     String v = main.getValue("Gerrit-ReloadMode");
     if (Strings.isNullOrEmpty(v) || "reload".equalsIgnoreCase(v)) {
@@ -167,7 +167,7 @@ public class ServerPlugin extends Plugin {
   }
 
   @Override
-  void start(PluginGuiceEnvironment env) throws Exception {
+  protected void start(PluginGuiceEnvironment env) throws Exception {
     RequestContext oldContext = env.enter(this);
     try {
       startPlugin(env);
@@ -241,7 +241,7 @@ public class ServerPlugin extends Plugin {
   }
 
   @Override
-  void stop(PluginGuiceEnvironment env) {
+  protected void stop(PluginGuiceEnvironment env) {
     if (serverManager != null) {
       RequestContext oldContext = env.enter(this);
       try {