Using RateLimiter from Guava to avoid triggering GitHub abuse detection mechanism

github-core/src/main/java/com/github/maven/plugins/core/GitHubProjectMojo.java

@@ -192,7 +192,7 @@ protected GitHubClient createClient(String host, String userName,
 				}
 			}
 		}
-		
+
 		if (configureUsernamePassword(client, userName, password)
 				|| configureOAuth2Token(client, oauth2Token)
 				|| configureServerCredentials(client, serverId, settings,
@@ -215,10 +215,10 @@ protected GitHubClient createClient(String host, String userName,
 	protected GitHubClient createClient(String hostname)
 			throws MojoExecutionException {
 		if (!hostname.contains("://"))
-			return new GitHubClientEgit(hostname);
+			return new RateLimitedGitHubClient(hostname);
 		try {
 			URL hostUrl = new URL(hostname);
-			return new GitHubClientEgit(hostUrl.getHost(), hostUrl.getPort(),
+			return new RateLimitedGitHubClient(hostUrl.getHost(), hostUrl.getPort(),
 					hostUrl.getProtocol());
 		} catch (MalformedURLException e) {
 			throw new MojoExecutionException("Could not parse host URL "
@@ -234,7 +234,7 @@ protected GitHubClient createClient(String hostname)
 	 * @return non-null client
 	 */
 	protected GitHubClient createClient() {
-		return new GitHubClientEgit();
+		return new RateLimitedGitHubClient();
 	}
 
 	/**
@@ -333,7 +333,7 @@ protected boolean configureServerCredentials(final GitHubClient client,
 					throw new MojoExecutionException( "Unable to lookup SettingsDecrypter: " + cle.getMessage(), cle );
 				}
 			}
-				
+
 			serverUsername = server.getUsername();
 			serverPassword = server.getPassword();
 //		}
@@ -407,7 +407,7 @@ protected Server getServer(final Settings settings, final String serverId) {
 
 	/**
 	 * Check hostname that matched nonProxy setting
-	 * 
+	 *
 	 * @param proxy Maven Proxy. Must not null
 	 * @param hostname
 	 * @return matching result. true: match nonProxy
@@ -515,10 +515,10 @@ protected Proxy getProxy(final Settings settings, final String serverId, final S
 
 		return null;
 	}
-	
+
 	@Requirement
     private PlexusContainer container;
-	
+
     /**
      * {@inheritDoc}
      */
@@ -527,5 +527,5 @@ public void contextualize( Context context )
     {
         container = (PlexusContainer) context.get( PlexusConstants.PLEXUS_KEY );
     }
-	
+
 }

github-core/src/main/java/com/github/maven/plugins/core/RateLimitedGitHubClient.java

@@ -0,0 +1,52 @@
+package com.github.maven.plugins.core;
+
+import com.github.maven.plugins.core.egit.GitHubClientEgit;
+import com.google.common.util.concurrent.RateLimiter;
+
+import java.io.IOException;
+import java.net.HttpURLConnection;
+
+public class RateLimitedGitHubClient extends GitHubClientEgit {
+
+    /**
+     * AS per https://github.com/octokit/octokit.net/issues/638#issuecomment-67795998,
+     * it seems that GitHub only allow 20 API calls per 1-minute period
+     */
+    private RateLimiter rateLimiter = RateLimiter.create(20.0/60.0);
+
+    public RateLimitedGitHubClient() {
+        super();
+    }
+
+    public RateLimitedGitHubClient(String hostname) {
+        super(hostname);
+    }
+
+    public RateLimitedGitHubClient(String hostname, int port, String scheme) {
+        super(hostname, port, scheme);
+    }
+
+    @Override
+    protected HttpURLConnection createDelete(String uri) throws IOException {
+        //rateLimiter.acquire();
+        return super.createDelete(uri);
+    }
+
+    @Override
+    protected HttpURLConnection createGet(String uri) throws IOException {
+        //rateLimiter.acquire();
+        return super.createGet(uri);
+    }
+
+    @Override
+    protected HttpURLConnection createPost(String uri) throws IOException {
+        rateLimiter.acquire();
+        return super.createPost(uri);
+    }
+
+    @Override
+    protected HttpURLConnection createPut(String uri) throws IOException {
+        rateLimiter.acquire();
+        return super.createPut(uri);
+    }
+}

pom.xml

@@ -185,6 +185,13 @@
             <version>2.2.2</version>
         </dependency>
 
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <!-- More recent version incompatible with Guice from Maven / Sisu -->
+            <version>14.0</version>
+        </dependency>
+
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>