Package com.amazonaws.services.dynamodbv2.document

Examples of com.amazonaws.services.dynamodbv2.document.Table

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            .withInt("zipcode", 98052));
    }

    @Test
    public void howToAddElementsToSet() {
        Table table = dynamo.getTable(TABLE_NAME);
        // Add a set of phone numbers to the attribute "phone"
        final String phoneNumber1 = "123-456-7890";
        table.updateItem(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK,
            new AttributeUpdate("phone").put(new FluentHashSet<String>(phoneNumber1)));
        GetItemOutcome outcome = table.getItemOutcome(new GetItemSpec()
            .withPrimaryKey(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK)
            .withConsistentRead(true)
        );
        Item item = outcome.getItem();
        Set<String> phoneNumbers = item.getStringSet("phone");
        assertTrue(1 == phoneNumbers.size());
        System.out.println(phoneNumbers);

        // Add a 2nd phone number to the set
        final String phoneNumber2 = "987-654-3210";
        table.updateItem(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK,
            new AttributeUpdate("phone").addElements(phoneNumber2));
        outcome = table.getItemOutcome(new GetItemSpec()
            .withPrimaryKey(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK)
            .withConsistentRead(true));
        item = outcome.getItem();
        phoneNumbers = item.getStringSet("phone");
        System.out.println(phoneNumbers);
        assertTrue(2== phoneNumbers.size());

        // removes the 2nd phone number from the set
        table.updateItem(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK,
            new AttributeUpdate("phone").removeElements(phoneNumber2));
        outcome = table.getItemOutcome(new GetItemSpec()
            .withPrimaryKey(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK)
            .withConsistentRead(true));
        item = outcome.getItem();
        phoneNumbers = item.getStringSet("phone");
        System.out.println(phoneNumbers);
        assertTrue(1 == phoneNumbers.size());

        // deletes the phone attribute
        table.updateItem(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK,
                new AttributeUpdate("phone").delete());
        outcome = table.getItemOutcome(new GetItemSpec()
            .withPrimaryKey(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK)
            .withConsistentRead(true));
        item = outcome.getItem();
        phoneNumbers = item.getStringSet("phone");
        assertNull(phoneNumbers);
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        assertNull(phoneNumbers);
    }

    @Test
    public void howToAddNumerically() {
        Table table = dynamo.getTable(TABLE_NAME);
        GetItemOutcome outcome = table.getItemOutcome(new GetItemSpec()
            .withPrimaryKey(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK)
            .withConsistentRead(true)
        );
        Item item = outcome.getItem();
        final int oldZipCode = item.getInt("zipcode");

        // Increments the zip code attribute
        table.updateItem(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK,
                new AttributeUpdate("zipcode").addNumeric(1));
        outcome = table.getItemOutcome(new GetItemSpec()
            .withPrimaryKey(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK)
            .withConsistentRead(true));
        item = outcome.getItem();
        int newZipCode = item.getInt("zipcode");
        assertEquals(oldZipCode + 1, newZipCode);

        // Decrements the zip code attribute
        table.updateItem(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK,
                new AttributeUpdate("zipcode").addNumeric(-1));
        outcome = table.getItemOutcome(new GetItemSpec()
            .withPrimaryKey(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK)
            .withConsistentRead(true));
        item = outcome.getItem();
        newZipCode = item.getInt("zipcode");
        assertEquals(oldZipCode, newZipCode);
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    }

    @Test
    public void howToSpecifyUpdateConditions() {
        final String phoneNumberToAdd = "987-654-3210";
        Table table = dynamo.getTable(TABLE_NAME);
        System.out.println(table.getItemOutcome(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK));
        try {
            table.updateItem(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK,
                // Specifies the criteria that the "phone" attribute must exist
                // as a precondition to adding the phone number
                Arrays.asList(new Expected("phone").exists()),
                // Adds the phone number if the expectation is satisfied
                new AttributeUpdate("phone").addElements(phoneNumberToAdd));
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        }
    }

    @Test
    public void howToUseUpdateExpression() {
        Table table = dynamo.getTable(TABLE_NAME);
        table.updateItem(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK,
            // update expression
            "set #phoneAttributeName = :phoneAtributeValue",
            new NameMap().with("#phoneAttributeName", "phone"),
            new ValueMap().withStringSet(":phoneAtributeValue",
                "123-456-7890", "987-654-3210")
            );
        GetItemOutcome outcome = table.getItemOutcome(new GetItemSpec()
            .withPrimaryKey(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK)
            .withConsistentRead(true));
        Item item = outcome.getItem();
        Set<String> phoneNumbers = item.getStringSet("phone");
        assertTrue(phoneNumbers.size() == 2);
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        System.out.println(phoneNumbers);
    }

    @Test
    public void howToUseConditionExpression() {
        Table table = dynamo.getTable(TABLE_NAME);
        GetItemOutcome outcome = table.getItemOutcome(new GetItemSpec()
            .withPrimaryKey(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK)
            .withConsistentRead(true));
        Item item = outcome.getItem();
        System.out.println(item);
        table.updateItem(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK,
            // update expression (list_append: concatenate two lists.)
            "set phone = list_append(:a, :b)",
            // condition expression
            "zipcode = :zipcode",
            null,
            new ValueMap()
                 .withInt(":zipcode", 98104)
                 .withList(":a", "phone-1", "phone-2")
                 .withList(":b", "phone-3", "phone-4")
         );
        outcome = table.getItemOutcome(new GetItemSpec()
            .withPrimaryKey(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK)
            .withConsistentRead(true));
        item = outcome.getItem();
        System.out.println(item);
    }
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     * can be accessed via a combination of hash keys and range keys.
     */
    @Test
    public void howToCreateTable() throws InterruptedException {
        String TABLE_NAME = "myTableForMidLevelApi";
        Table table = dynamo.getTable(TABLE_NAME);
        // check if table already exists, and if so wait for it to become active
        TableDescription desc = table.waitForActiveOrDelete();
        if (desc != null) {
            System.out.println("Skip creating table which already exists and ready for use: "
                    + desc);
            return;
        }
        // Table doesn't exist.  Let's create it.
        table = dynamo.createTable(newCreateTableRequest(TABLE_NAME));
        // Wait for the table to become active
        desc = table.waitForActive();
        System.out.println("Table is ready for use! " + desc);
    }
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        new B_PutItemTest().howToPutItems();
    }

    @Test
    public void howToUseScanFilters() {
        Table table = dynamo.getTable(TABLE_NAME);
        ItemCollection<?> col = table.scan(
                new ScanFilter(HASH_KEY_NAME).eq("foo"),
                new ScanFilter(RANGE_KEY_NAME).between(1, 10)
        );
        int count = 0;
        for (Item item: col) {
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        Assert.assertTrue(count == 10);
    }

    @Test
    public void howToUseFilterExpression() {
        Table table = dynamo.getTable(TABLE_NAME);
        ItemCollection<?> col = table.scan(
            // filter expression
              "myHashKey = :myHashKey AND "
            + "myRangeKey BETWEEN :lo and :hi AND "
            + "intAttr > :intAttr",
            // no attribute name substitution
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        Assert.assertTrue(count < 10);
    }

    @Test
    public void howToUseFilterExpression_AttrNameSubstitution() {
        Table table = dynamo.getTable(TABLE_NAME);
        ItemCollection<?> col = table.scan(
            // filter expression
              "myHashKey = :myHashKey AND "
            + "#myRangeKey BETWEEN :lo and :hi AND "
            + "intAttr > :intAttr",
            // attribute name substitution
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        Assert.assertTrue(count < 10);
    }

    @Test
    public void howToUseProjectionExpression() {
        Table table = dynamo.getTable(TABLE_NAME);
        ItemCollection<?> col = table.scan(
            // filter expression
              "myHashKey = :myHashKey AND "
            + "#myRangeKey BETWEEN :lo and :hi AND "
            + "intAttr > :intAttr",
            // projection expression
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Related Classes of com.amazonaws.services.dynamodbv2.document.Table

  • AmazonDynamoDBSample
  • com.amazonaws.auth.DefaultAWSCredentialsProviderChain
  • com.amazonaws.ClientConfiguration
  • com.amazonaws.handlers.HandlerChainFactory
  • com.amazonaws.http.ExecutionContext
  • com.amazonaws.http.JsonErrorResponseHandler
  • com.amazonaws.internal.StaticCredentialsProvider
  • com.amazonaws.metrics.internal.cloudwatch.provider.transform.DynamoDBRequestMetricTransformer
  • com.amazonaws.services.dynamodbv2.datamodeling.ArgumentMarshaller.StringAttributeMarshaller
  • com.amazonaws.services.dynamodbv2.datamodeling.ArgumentMarshaller.StringSetAttributeMarshaller
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