p4 start

2024-04-12 10:39:46 -04:00
parent f7697e992f
commit 51f720ad9f
7 changed files with 544 additions and 0 deletions
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+package CC;
+import java.util.List;
+
+public class CC
+{
+
+	/**
+	 * Notes:
+	 *  - Execute all given transactions, using locking.
+	 *  - Each element in the transactions List represents all operations performed by one transaction, in order.
+	 *  - No operation in a transaction can be executed out of order, but operations may be interleaved with other
+	 *    transactions if allowed by the locking.
+	 *  - The index of the transaction in the list is equivalent to the transaction ID.
+	 *  - Print the log to the console at the end of the method.
+	 *  - Return the new db state after executing the transactions.
+	 * @param db the initial status of the db
+	 * @param transactions the schedule, which basically is a {@link List} of transactions.
+	 * @return the final status of the db
+	 */
+	public static int[] executeSchedule(int[] db, List<String> transactions)
+	{
+		//TODO
+		return null ;
+	}
+}
@@ -0,0 +1,52 @@
+package CC;
+
+import java.util.Arrays;
+import java.util.List;
+
+public class Project
+{
+	
+	public static int[] newDB()
+	{
+		return new int[]{0,1,2,3,4,5,6,7,8,9};
+	}
+	
+	public static void main(String[] args)
+	{
+		//Test Cases
+		//1) Simple testcase (handout)
+		List<String> tc1 = Arrays.asList(new String[]{"W(1,5);R(2);W(2,3);R(1);C","R(1);W(1,2);C"});
+		//2) Three transactions
+		List<String> tc2 = Arrays.asList(new String[]{"R(6);W(7,2);W(5,8);W(6,2);C","R(4);W(2,4);R(5);W(7,3);C","R(9);R(6);W(1,9);C"});
+		//3) Deadlocks
+		List<String> tc3 = Arrays.asList(new String[]{"W(4,1);R(1);W(1,2);C","W(5,2);R(1);R(2);W(2,3);C","W(6,3);R(2);W(2,4);C"});
+		//4) No conflicts
+		List<String> tc4 = Arrays.asList(new String[]{"R(1);R(2);R(3);W(4,1);C","R(1);R(2);R(3);W(5,2);C"});
+		//5) Multiple Deadlocks (handout)
+		List<String> tc5 = Arrays.asList(new String[]{"R(1);W(2,1);C","R(2);R(3);W(1,2);C","R(1);W(3,4);C"});
+		//6) Larger Deadlock Cycle
+		List<String> tc6 = Arrays.asList(new String[]{"R(1);W(2,1);C","R(2);W(3,2);C","R(3);W(4,3);C","R(4);W(1,4);C"});
+		//7) Small Deadlock Cycle
+		List<String> tc7 = Arrays.asList(new String[]{"W(1,2);R(2);C","W(2,5);R(1);C"});
+		//8) Three Transactions Deadlock Cycle
+		List<String> tc8 = Arrays.asList(new String[]{"R(6);W(7,2);W(2,8);W(6,2);C","R(4);W(2,4);R(5);W(7,3);C","R(9);R(6);W(1,9);C"});
+		//9) Small Transactions without Deadlock Cycle
+		List<String> tc9 = Arrays.asList(new String[]{"W(1,2);R(2);C","W(3,5);R(4);C"});
+		//10) Testcase with Deadlock Cycle
+		List<String> tc10 = Arrays.asList(new String[]{"W(1,5);R(2);W(2,3);R(1);C","R(2);R(1);W(1,2);C"});
+
+		//Consult the ExpectedOutputs.txt for the expected DB state and log
+		
+		System.out.println("Schedule 1: Handout Test Case:\n\t" + Arrays.toString(CC.executeSchedule(newDB(),tc1)) + "\n");
+		System.out.println("Schedule 2: Three Transactions Test Case:\n\t" + Arrays.toString(CC.executeSchedule(newDB(),tc2)) + "\n");
+		System.out.println("Schedule 3: Deadlocks Test Case:\n\t" + Arrays.toString(CC.executeSchedule(newDB(),tc3)) + "\n");
+		System.out.println("Schedule 4: No Conflicts Test Case:\n\t" + Arrays.toString(CC.executeSchedule(newDB(),tc4)) + "\n");
+		System.out.println("Schedule 5: Multiple Deadlocks Test Case:\n\t" + Arrays.toString(CC.executeSchedule(newDB(),tc5)) + "\n");
+		System.out.println("Schedule 6: Larger Deadlock Cycle Test Case:\n\t" + Arrays.toString(CC.executeSchedule(newDB(),tc6)) + "\n");	
+		System.out.println("Schedule 7: Testcase with two transactions and a deadlock\n\t" + Arrays.toString(CC.executeSchedule(newDB(),tc7)) + "\n");
+		System.out.println("Schedule 8: Testcase with three transactions and a deadlock:\n\t" + Arrays.toString(CC.executeSchedule(newDB(),tc8)) + "\n");
+		System.out.println("Schedule 9: Testcase with two transactions and no deadlocks:\n\t" + Arrays.toString(CC.executeSchedule(newDB(),tc9)) + "\n");
+		System.out.println("Schedule 10: Testcase with deadlock between two transactions:\n\t" + Arrays.toString(CC.executeSchedule(newDB(),tc10)) + "\n");
+		
+	}
+}