Package com.amazonaws.services.dynamodbv2.document

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

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            )
            // or you can take it slow and add one at a time
            .addHashAndRangePrimaryKey(HASH_KEY_NAME, "foo", RANGE_KEY_NAME, 4)
            .addHashAndRangePrimaryKey(HASH_KEY_NAME, "foo", RANGE_KEY_NAME, 5)
            ;
        BatchGetItemOutcome outcome = dynamo.batchGetItem(
                ReturnConsumedCapacity.TOTAL, tableKeysAndAttributes);
        Map<String, List<Item>> tableItems = outcome.getTableItems();
        Assert.assertTrue(tableItems.size() == 1);
        for (Map.Entry<String, List<Item>> e: tableItems.entrySet()) {
            System.out.println("tableName: " + e.getKey());
            for (Item item: e.getValue()) {
                System.out.println("item: " + item);
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                "foo",          3,
                "foo",          4,
                "foo",          5
                // etc.
            );
        BatchGetItemOutcome outcome = dynamo.batchGetItem(
                ReturnConsumedCapacity.TOTAL, tableKeysAndAttributes);
        Map<String, List<Item>> tableItems = outcome.getTableItems();
        Assert.assertTrue(tableItems.size() == 1);
        for (Map.Entry<String, List<Item>> e: tableItems.entrySet()) {
            System.out.println("tableName: " + e.getKey());
            for (Item item: e.getValue()) {
                System.out.println("item: " + item);
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        }
    }

    @Test
    public void howToBatchGet_FromMultipleTables() {
        BatchGetItemOutcome outcome = dynamo.batchGetItem(
            // First table
            new TableKeysAndAttributes(TABLE_NAME)
                .withAttrbuteNames("binary", "booleanTrue", "intAttr",
                        "mapAttr", "stringSetAttr")
                // you can add a bunch of keys in one go
                .addHashAndRangePrimaryKeys(
                    HASH_KEY_NAME, RANGE_KEY_NAME,
                    "foo",          1,
                    "foo",          2,
                    "foo",          3
                    // etc.
                ),
            // Second table
            new TableKeysAndAttributes(F_UpdateItemTest.TABLE_NAME)
                .withAttrbuteNames(F_UpdateItemTest.HASH_KEY, F_UpdateItemTest.RANGE_KEY, "AddressLine1",
                        "city", "state", "zipcode", "phone")
                // you can add a bunch of keys in one go
                .addHashAndRangePrimaryKeys(
                    F_UpdateItemTest.HASH_KEY,          F_UpdateItemTest.RANGE_KEY,
                    F_UpdateItemTest.FIRST_CUSTOMER_ID, F_UpdateItemTest.ADDRESS_TYPE_HOME,
                    F_UpdateItemTest.FIRST_CUSTOMER_ID, F_UpdateItemTest.ADDRESS_TYPE_WORK
                    // etc.
                )
            );
        Map<String, List<Item>> tableItems = outcome.getTableItems();
        Assert.assertTrue(tableItems.size() == 2);
        for (Map.Entry<String, List<Item>> e: tableItems.entrySet()) {
            String tableName = e.getKey();
            System.out.println("tableName: " + tableName);
            for (Item item: e.getValue()) {
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        do {
            if (attempts > 0) {
                // exponential backoff per DynamoDB recommendation
                Thread.sleep((1 << attempts) * 1000);
            }
            BatchGetItemOutcome outcome;
            if (unprocessed == null || unprocessed.size() > 0) {
                // handle initial request
                outcome = dynamo.batchGetItem(tableKeysAndAttributes);
            } else {
                // handle unprocessed items
                outcome = dynamo.batchGetItemUnprocessed(unprocessed);
            }
            Map<String, List<Item>> tableItems = outcome.getTableItems();
            for (Map.Entry<String, List<Item>> e : tableItems.entrySet()) {
                System.out.println("tableName: " + e.getKey());
                for (Item item : e.getValue()) {
                    System.out.println("item: " + item);
                }
                Assert.assertTrue(e.getValue().size() == 5);
            }
            unprocessed = outcome.getUnprocessedKeys();
            System.out.println("unprocessed: " + unprocessed);
        } while (unprocessed.size() > 0);
    }
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        }
        BatchGetItemRequest req = spec.getRequest()
                .withRequestItems(requestItems)
                .withReturnConsumedCapacity(spec.getReturnConsumedCapacity());
        BatchGetItemResult result = client.batchGetItem(req);
        return new BatchGetItemOutcome(result);
    }
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                if ( getterResult == null && reflector.isAssignableKey(method) ) {
                    onAutoGenerateAssignableKey(method, attributeName);
                }
               
                else {
                    AttributeValue newAttributeValue = getSimpleAttributeValue(method, getterResult);
                    if ( newAttributeValue == null ) {
                        throw new DynamoDBMappingException("Null or empty value for key: " + method);
                    }

                    onKeyAttributeValue(attributeName, newAttributeValue);
                }
            }

            /*
             * Next construct an update for every non-key property
             */
            for ( Method method : reflector.getRelevantGetters(clazz) ) {

                // Skip any key methods, since they are handled separately
                if ( keyGetters.contains(method) )
                    continue;

                Object getterResult = safeInvoke(method, object);
                String attributeName = reflector.getAttributeName(method);

                /*
                 * If this is a versioned field, update it
                 */
                if ( reflector.isVersionAttributeGetter(method) ) {
                    onVersionAttribute(method, getterResult, attributeName);
                    nonKeyAttributePresent = true;
                }

                /*
                 * Otherwise apply the update value for this attribute.
                 */
                else  {
                    AttributeValue currentValue = getSimpleAttributeValue(method, getterResult);
                    if ( currentValue != null ) {
                        onNonKeyAttribute(attributeName, currentValue);
                        nonKeyAttributePresent = true;
                    } else {
                        onNullNonKeyAttribute(attributeName);
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        protected List<ValueUpdate> getInMemoryUpdates() {
            return inMemoryUpdates;
        }
       
        private void onAutoGenerateAssignableKey(Method method, String attributeName) {
            AttributeValue newVersionValue = getAutoGeneratedKeyAttributeValue(method, null);
           
            updateValues.put(attributeName,
                    new AttributeValueUpdate().withAction("PUT").withValue(newVersionValue));
            inMemoryUpdates.add(new ValueUpdate(method, newVersionValue, object));
           
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                // update call
                ExpectedAttributeValue expected = new ExpectedAttributeValue();

                // For new objects, insist that the value doesn't exist.
                // For existing ones, insist it has the old value.
                AttributeValue currentValue = getSimpleAttributeValue(method, getterResult);
                expected.setExists(currentValue != null);
                if ( currentValue != null ) {
                    expected.setValue(currentValue);
                }
                expectedValues.put(attributeName, expected);
            }

            AttributeValue newVersionValue = getVersionAttributeValue(method, getterResult);
            updateValues
                    .put(attributeName, new AttributeValueUpdate().withAction("PUT").withValue(newVersionValue));
            inMemoryUpdates.add(new ValueUpdate(method, newVersionValue, object));
        }
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    private <T> Map<String, AttributeValue> getKey(T keyObject, Class<T> clazz) {
        Map<String, AttributeValue> key = new HashMap<String, AttributeValue>();
        for (Method keyGetter : reflector.getKeyGetters(clazz)) {
            Object getterResult = safeInvoke(keyGetter, keyObject);
            AttributeValue keyAttributeValue = getSimpleAttributeValue(keyGetter, getterResult);
            if (keyAttributeValue == null) {
                throw new DynamoDBMappingException("Null key found for " + keyGetter);
            }
            key.put(reflector.getAttributeName(keyGetter), keyAttributeValue);
        }
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                if ( reflector.isVersionAttributeGetter(method) ) {
                    Object getterResult = safeInvoke(method, object);
                    String attributeName = reflector.getAttributeName(method);

                    ExpectedAttributeValue expected = new ExpectedAttributeValue();
                    AttributeValue currentValue = getSimpleAttributeValue(method, getterResult);
                    expected.setExists(currentValue != null);
                    if ( currentValue != null )
                        expected.setValue(currentValue);
                    expectedValues.put(attributeName, expected);
                    break;
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