keith-turner commented on a change in pull request #38: Continue tour
URL: https://github.com/apache/accumulo-website/pull/38#discussion_r150922810
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File path: tour/data-model-code.md
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@@ -0,0 +1,65 @@
+---
+title: Data Model Code
+---
+
+```java
+ // Connect to Mini Accumulo as the root user and create a table called
"GothamPD".
+ Connector conn = mac.getConnector("root", "tourguide");
+ conn.tableOperations().create("GothamPD");
+
+ // Create 3 Mutation objects to hold each person of interest.
+ Mutation mutation1 = new Mutation("id0001");
+ Mutation mutation2 = new Mutation("id0002");
+ Mutation mutation3 = new Mutation("id0003");
+
+ // Create key/value pairs for each Mutation, putting them in the
appropriate family.
+ mutation1.put("hero","alias", "Batman");
+ mutation1.put("hero","name", "Bruce Wayne");
+ mutation1.put("hero","wearsCape?", "true");
+ mutation2.put("hero","alias", "Robin");
+ mutation2.put("hero","name", "Dick Grayson");
+ mutation2.put("hero","wearsCape?", "true");
+ 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. Try w/ resources will close for us.
+ try(BatchWriter writer = conn.createBatchWriter("GothamPD", new
BatchWriterConfig())) {
+ 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 = conn.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.println("Key:" + entry.getKey());
Review comment:
Personally I would do some formatting here... I would try the following and
see which one I liked
Could line up key and value
```java
System.out.println("Key : " + entry.getKey());
System.out.println("Value : " + entry.getValue());
```
or could put them on one line with formatting
```java
System.out.printf("Key : %30s Value : %s\n", entry.getKey(),
entry.getKey());
```
as long as all keys are shorter then 30 chars this should line up nicely...
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