Add Retry annotation (#139)

Author: TsuyoshiUshio

mvnBuildFunctionPluginsSkipTests.bat

@@ -1 +1 @@
-mvn clean install -pl build-tools,azure-maven-plugins-pom,azure-tools-common,azure-maven-plugin-lib,azure-functions-maven-plugin -Dmaven.javadoc.skip=true -Dmaven.test.skip -U -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn -B
+mvn clean install -pl build-tools,azure-maven-plugins-pom,azure-tools-common,azure-auth-helper,azure-maven-plugin-lib,azure-functions-maven-plugin -Dmaven.javadoc.skip=true -Dmaven.test.skip -U -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn -B

pom.xml

@@ -4,7 +4,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>com.microsoft.azure.functions</groupId>
 	<artifactId>azure-functions-java-library</artifactId>
-	<version>1.4.1-SNAPSHOT</version>
+	<version>1.4.2-SNAPSHOT</version>
 	<packaging>jar</packaging>
 	<parent>
 		<groupId>com.microsoft.maven</groupId>

src/main/java/com/microsoft/azure/functions/annotation/ExponentialBackoffRetry.java

@@ -0,0 +1,44 @@
+/**
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for
+ * license information.
+ */
+
+package com.microsoft.azure.functions.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * <p>
+ * Defines an exponential backoff retry strategy, where the delay between retries
+ * will get progressively larger, limited by the max/min specified.</p>
+ *
+ * @since 1.0.0
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+public @interface ExponentialBackoffRetry {
+    /**
+     * The strategy of retries that will be used internally.
+     * @return The strategy of retries.
+     */
+    String strategy() default "exponentialBackoff";
+    /**
+     * The maximum number of retries that will be attempted.
+     * @return The maximum retry count.
+     */
+    int maxRetryCount();
+    /**
+     * The minimum delay interval.
+     * @return The minimum retry delay.
+     */
+    String minimumInterval();
+    /**
+     * The maximum delay interval.
+     * @return The maximum retry delay.
+     */
+    String maximumInterval();
+}

src/main/java/com/microsoft/azure/functions/annotation/FixedDelayRetry.java

@@ -0,0 +1,38 @@
+/**
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for
+ * license information.
+ */
+
+package com.microsoft.azure.functions.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * <p>
+ * Defines a retry strategy where a fixed delay is used between retries.</p>
+ *
+ * @since 1.0.0
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+public @interface FixedDelayRetry {
+    /**
+     * The strategy of retries that will be used internally.
+     * @return The strategy of retries.
+     */
+    String strategy() default "fixedDelay";
+    /**
+     * The maximum number of retries that will be attempted.
+     * @return The delay between retries.
+     */
+    int maxRetryCount();
+    /**
+     * The delay between retries.
+     * @return The delay interval.
+     */
+    String delayInterval();
+}