Below is the solution for the exercise.
static void exercise(AccumuloClient client) throws Exception { // create a table called "GothamPD". client.tableOperations().create("GothamPD"); // Create a row for Batman Mutation mutation1 = new Mutation("id0001"); mutation1.put("hero","alias", "Batman"); mutation1.put("hero","name", "Bruce Wayne"); mutation1.put("hero","wearsCape?", "true"); // Create a row for Robin Mutation mutation2 = new Mutation("id0002"); mutation2.put("hero","alias", "Robin"); mutation2.put("hero","name", "Dick Grayson"); mutation2.put("hero","wearsCape?", "true"); // Create a row for Joker Mutation mutation3 = new Mutation("id0003"); mutation3.put("villain","alias", "Joker"); mutation3.put("villain","name", "Unknown"); mutation3.put("villain","wearsCape?", "false"); // Create a BatchWriter to the GothamPD table and add your mutations to it. // Once the BatchWriter is closed by the try w/ resources, data will be available to scans. try (BatchWriter writer = client.createBatchWriter("GothamPD")) { writer.addMutation(mutation1); writer.addMutation(mutation2); writer.addMutation(mutation3); } // Read and print all rows of the "GothamPD" table. Try w/ resources will close for us. try (Scanner scan = client.createScanner("GothamPD", Authorizations.EMPTY)) { System.out.println("Gotham Police Department Persons of Interest:"); // A Scanner is an extension of java.lang.Iterable so behaves just like one. for (Map.Entry<Key, Value> entry : scan) { System.out.printf("Key : %-50s Value : %s\n", entry.getKey(), entry.getValue()); } } }
The code above will print (timestamp will differ):
Gotham Police Department Persons of Interest: Key : id0001 hero:alias [] 1511306370025 false Value : Batman Key : id0001 hero:name [] 1511306370025 false Value : Bruce Wayne Key : id0001 hero:wearsCape? [] 1511306370025 false Value : true Key : id0002 hero:alias [] 1511306370025 false Value : Robin Key : id0002 hero:name [] 1511306370025 false Value : Dick Grayson Key : id0002 hero:wearsCape? [] 1511306370025 false Value : true Key : id0003 villain:alias [] 1511306370025 false Value : Joker Key : id0003 villain:name [] 1511306370025 false Value : Unknown Key : id0003 villain:wearsCape? [] 1511306370025 false Value : false