Commander pattern #505 (#857)

* Commander pattern * Fix checkstyle errors * Update Commander.java * Update README.md * Update PaymentService.java * Update Commander.java * Update README.md
2019-07-29 23:39:08 +05:30
parent a113de6a14
commit d9a567cf97
32 changed files with 2620 additions and 0 deletions
--- a/commander/src/test/java/com/iluwatar/commander/RetryTest.java
+++ b/commander/src/test/java/com/iluwatar/commander/RetryTest.java
@@ -0,0 +1,76 @@
+/**
+ * The MIT License
+ * Copyright (c) 2014-2016 Ilkka Sepp<70>l<EFBFBD>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package com.iluwatar.commander;
+
+import static org.junit.jupiter.api.Assertions.*;
+import java.util.ArrayList;
+import java.util.Arrays;
+import org.junit.jupiter.api.Test;
+
+import com.iluwatar.commander.Order;
+import com.iluwatar.commander.Retry;
+import com.iluwatar.commander.User;
+import com.iluwatar.commander.Retry.HandleErrorIssue;
+import com.iluwatar.commander.Retry.Operation;
+import com.iluwatar.commander.exceptions.DatabaseUnavailableException;
+import com.iluwatar.commander.exceptions.ItemUnavailableException;
+
+class RetryTest {
+
+  @Test
+  void performTest() {
+    Retry.Operation op = (l) -> { 
+      if (!l.isEmpty()) {
+        throw l.remove(0);
+      }
+      return; 
+    };
+    Retry.HandleErrorIssue<Order> handleError = (o,e) -> { 
+      return; 
+    };
+    Retry<Order> r1 = new Retry<Order>(op, handleError, 3, 30000,
+        e -> DatabaseUnavailableException.class.isAssignableFrom(e.getClass()));
+    Retry<Order> r2 = new Retry<Order>(op, handleError, 3, 30000,
+        e -> DatabaseUnavailableException.class.isAssignableFrom(e.getClass()));
+    User user = new User("Jim", "ABCD");
+    Order order = new Order(user, "book", 10f);
+    ArrayList<Exception> arr1 = new ArrayList<Exception>(Arrays.asList(new Exception[]
+        {new ItemUnavailableException(), new DatabaseUnavailableException()}));
+    try {
+      r1.perform(arr1, order);
+    } catch (Exception e1) {
+      e1.printStackTrace();
+    }
+    ArrayList<Exception> arr2 = new ArrayList<Exception>(Arrays.asList(new Exception[]
+        {new DatabaseUnavailableException(), new ItemUnavailableException()}));
+    try {
+      r2.perform(arr2, order);
+    } catch (Exception e1) {
+      e1.printStackTrace();
+    }
+    //r1 stops at ItemUnavailableException, r2 retries because it encounters DatabaseUnavailableException
+    assertTrue(arr1.size() == 1 && arr2.size() == 0);
+  }
+
+}