Examples of com.amazonaws.services.dynamodbv2.model.DeleteItemRequest

Package com.amazonaws.services.dynamodbv2.model

Examples of com.amazonaws.services.dynamodbv2.model.DeleteItemRequest

com.amazonaws.services.dynamodbv2.model.ExpectedAttributeValue
Container for the parameters to the {@link com.amazonaws.services.dynamodbv2.AmazonDynamoDB#deleteItem(DeleteItemRequest) DeleteItem operation}.
Deletes a single item in a table by primary key. You can perform a conditional delete operation that deletes the item if it exists, or if it has an expected attribute value.

In addition to deleting an item, you can also return the item's attribute values in the same operation, using the ReturnValues parameter.

Unless you specify conditions, the DeleteItem is an idempotent operation; running it multiple times on the same item or attribute does not result in an error response.

Conditional deletes are useful for only deleting items if specific conditions are met. If those conditions are met, Amazon DynamoDB performs the delete. Otherwise, the item is not deleted.
@see com.amazonaws.services.dynamodbv2.AmazonDynamoDB#deleteItem(DeleteItemRequest)

    @Override
    @Cacheable.FlushBefore
    public boolean remove(@NotNull final Domain domain) {
        final AmazonDynamoDB amazon = this.client.get();
        amazon.deleteItem(
            new DeleteItemRequest(
                this.table,
                new ImmutableMap.Builder<String, AttributeValue>()
                    .put(DefaultDynamo.NAME, new AttributeValue(domain.name()))
                    .build()
            )

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        //Overlay any user provided expected values onto the generated ones
        if(deleteExpression != null && deleteExpression.getExpected() != null){
            expectedValues.putAll(deleteExpression.getExpected());
        }


        DeleteItemRequest req = applyUserAgent(new DeleteItemRequest()
            .withKey(key).withTableName(tableName)
            .withExpected(expectedValues))
            .withRequestMetricCollector(config.getRequestMetricCollector())
            ;
        db.deleteItem(req);

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        //Overlay any user provided expected values onto the generated ones
        if(deleteExpression != null && deleteExpression.getExpected() != null){
            expectedValues.putAll(deleteExpression.getExpected());
        }


        DeleteItemRequest req = applyUserAgent(new DeleteItemRequest()
            .withKey(key).withTableName(tableName)
            .withExpected(expectedValues))
            .withRequestMetricCollector(config.getRequestMetricCollector())
            ;
        db.deleteItem(req);

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  private void deleteRow(String key, String cf) {
    if (StringUtils.isBlank(key) || StringUtils.isBlank(cf)) {
      return;
    }
    try {
      DeleteItemRequest delItemRequest = new DeleteItemRequest(cf,
          Collections.singletonMap(Config._KEY, new AttributeValue(key)));
      client().deleteItem(delItemRequest);
    } catch (Exception e) {
      logger.error(null, e);
    }

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                    break;
                }
            }
        }


        db.deleteItem(applyUserAgent(new DeleteItemRequest().withKey(key).withTableName(tableName).withExpected(expectedValues)));
    }

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        //Overlay any user provided expected values onto the generated ones
        if(deleteExpression != null && deleteExpression.getExpected() != null){
            expectedValues.putAll(deleteExpression.getExpected());
        }


        db.deleteItem(applyUserAgent(new DeleteItemRequest().withKey(key).withTableName(tableName).withExpected(expectedValues)));
    }

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                    break;
                }
            }
        }


        db.deleteItem(applyUserAgent(new DeleteItemRequest().withKey(key).withTableName(tableName).withExpected(expectedValues)));
    }

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            if ( !requestItems.containsKey(tableName) ) {
                requestItems.put(tableName, new LinkedList<WriteRequest>());
            }


            requestItems.get(tableName).add(
                    new WriteRequest().withDeleteRequest(new DeleteRequest().withKey(key)));
        }


        // Break into chunks of 25 items and make service requests to DynamoDB
        while ( !requestItems.isEmpty() ) {
            HashMap<String, List<WriteRequest>> batch = new HashMap<String, List<WriteRequest>>();

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        Map<String, ExpectedAttributeValue> expectedValues = new HashMap<String, ExpectedAttributeValue>();


        String hashKeyAttributeName = reflector.getAttributeName(hashKeyGetter);
        Object hashGetterResult = safeInvoke(hashKeyGetter, object);
        attributes.put(hashKeyAttributeName, getSimpleAttributeValue(hashKeyGetter, hashGetterResult));
        expectedValues.put(hashKeyAttributeName, new ExpectedAttributeValue().withExists(false));


        if (rangeKeyGetter != null) {
            String rangeKeyAttributeName = reflector.getAttributeName(rangeKeyGetter);
            Object rangeGetterResult = safeInvoke(rangeKeyGetter, object);
            attributes.put(rangeKeyAttributeName, getSimpleAttributeValue(rangeKeyGetter, rangeGetterResult));
            expectedValues.put(rangeKeyAttributeName, new ExpectedAttributeValue().withExists(false));
        }
        attributes = transformAttributes(clazz, attributes);
        db.putItem(applyUserAgent(new PutItemRequest().withTableName(tableName).withItem(attributes)
                .withExpected(expectedValues)));
    }

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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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