feat: add util for retrying an api command automatically after delay (#…

…83)

pom.xml

@@ -4,7 +4,7 @@
 
   <groupId>com.bigboxer23</groupId>
   <artifactId>utils</artifactId>
-  <version>2.0.26</version>
+  <version>2.0.27</version>
 
   <name>utils</name>
   <!-- FIXME change it to the project's website -->

src/main/java/com/bigboxer23/utils/command/RetryingCommand.java

@@ -0,0 +1,29 @@
+package com.bigboxer23.utils.command;
+
+import java.io.IOException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/** Run a command and retry it once after a pause */
+public class RetryingCommand {
+	private static final Logger logger = LoggerFactory.getLogger(RetryingCommand.class);
+
+	public static <T> T execute(Command<T> command, String identifier) throws IOException {
+		try {
+			logger.info("Starting command " + identifier);
+			return command.execute();
+		} catch (IOException e) {
+			logger.error("error running command, attempting to retry " + identifier, e);
+			try {
+				Thread.sleep(5 * 1000); // 5 sec
+				return command.execute();
+			} catch (IOException e2) {
+				logger.error("error retrying command " + identifier, e2);
+				throw e2;
+			} catch (InterruptedException e2) {
+				logger.error("error retrying command " + identifier, e2);
+			}
+		}
+		return null;
+	}
+}