public Key unmarshall(JsonUnmarshallerContext context) throws Exception {
Key key = new Key();
int originalDepth = context.getCurrentDepth();
int targetDepth = originalDepth + 1;
JsonToken token = context.currentToken;
if (token == null) token = context.nextToken();
while (true) {
if (token == null) break;
if (token == FIELD_NAME || token == START_OBJECT) {
if (context.testExpression("HashKeyElement", targetDepth)) {
context.nextToken();
key.setHashKeyElement(AttributeValueJsonUnmarshaller.getInstance().unmarshall(context));
}
if (context.testExpression("RangeKeyElement", targetDepth)) {
context.nextToken();
key.setRangeKeyElement(AttributeValueJsonUnmarshaller.getInstance().unmarshall(context));
}
} else if (token == END_ARRAY || token == END_OBJECT) {
if (context.getCurrentDepth() <= originalDepth) break;
}
token = context.nextToken();
}
return key;
}
@Test
public void queryUpdate() {
// Setup table with items
KeySchema schema =
new KeySchema(
new KeySchemaElement()
.withAttributeName("id")
.withAttributeType(ScalarAttributeType.S));
createTable(tableName, schema);
Key key = new Key();
key.setHashKeyElement(new AttributeValue().withS("1"));
Map<String, AttributeValueUpdate> dynValues = new HashMap<String, AttributeValueUpdate>();
dynValues.put(
"count", new AttributeValueUpdate(new AttributeValue().withN("100"), AttributeAction.ADD));
UpdateItemRequest update = new UpdateItemRequest(tableName, key, dynValues);
getClient().updateItem(update);
inProcessClient.save(PERSISTENCE_PATH);
createNewInProcessClient().restore(PERSISTENCE_PATH);
AttributeValue hashKey = new AttributeValue().withS("1");
QueryRequest request = new QueryRequest(tableName, hashKey);
QueryResult result = getClient().query(request);
Assert.assertNotNull(result.getItems());
Assert.assertNotSame(result.getItems().size(), 0);
Map<String, AttributeValue> row = result.getItems().get(0);
Assert.assertEquals(row.get("id"), hashKey);
Assert.assertEquals(row.get("count").getN(), "100");
}
@Test
public void conditionalDeleteOldFieldUpdateOnHit() {
// Setup table with items
KeySchema schema =
new KeySchema(
new KeySchemaElement()
.withAttributeName("id")
.withAttributeType(ScalarAttributeType.S));
createTable(tableName, schema);
Key key = new Key();
key.setHashKeyElement(new AttributeValue().withS("1"));
Map<String, AttributeValueUpdate> oldValues = new HashMap<String, AttributeValueUpdate>();
oldValues.put(
"count", new AttributeValueUpdate(new AttributeValue().withN("100"), AttributeAction.PUT));
oldValues.put(
"ids",
new AttributeValueUpdate(new AttributeValue().withS("[er, er]"), AttributeAction.ADD));
UpdateItemRequest update = new UpdateItemRequest(tableName, key, oldValues);
getClient().updateItem(update);
// conditional update
HashMap<String, AttributeValueUpdate> newValues = new HashMap<String, AttributeValueUpdate>();
newValues.put(
"count", new AttributeValueUpdate(new AttributeValue().withN("102"), AttributeAction.PUT));
newValues.put(
"ids",
new AttributeValueUpdate(new AttributeValue().withS("[er, er]"), AttributeAction.DELETE));
HashMap<String, ExpectedAttributeValue> expectedValues =
new HashMap<String, ExpectedAttributeValue>();
expectedValues.put(
"count", new ExpectedAttributeValue().withValue(new AttributeValue().withN("100")));
update =
new UpdateItemRequest()
.withTableName(tableName)
.withKey(key)
.withAttributeUpdates(newValues)
.withExpected(expectedValues);
getClient().updateItem(update);
inProcessClient.save(PERSISTENCE_PATH);
createNewInProcessClient().restore(PERSISTENCE_PATH);
AttributeValue hashKey = new AttributeValue().withS("1");
QueryRequest request = new QueryRequest(tableName, hashKey);
QueryResult result = getClient().query(request);
Assert.assertNotNull(result.getItems());
Assert.assertNotSame(result.getItems().size(), 0);
Map<String, AttributeValue> row = result.getItems().get(0);
Assert.assertEquals(row.get("id"), hashKey);
Assert.assertEquals(row.get("count").getN(), "102");
Assert.assertNull(row.get("ids"));
}
@Test
public void conditionalUpdateOnMissing() {
// Setup table with items
KeySchema schema =
new KeySchema(
new KeySchemaElement()
.withAttributeName("id")
.withAttributeType(ScalarAttributeType.S));
createTable(tableName, schema);
Key key = new Key();
key.setHashKeyElement(new AttributeValue().withS("1"));
Map<String, AttributeValueUpdate> oldValues = new HashMap<String, AttributeValueUpdate>();
oldValues.put(
"count", new AttributeValueUpdate(new AttributeValue().withN("100"), AttributeAction.PUT));
UpdateItemRequest update = new UpdateItemRequest(tableName, key, oldValues);
getClient().updateItem(update);
// conditional update
HashMap<String, AttributeValueUpdate> newValues = new HashMap<String, AttributeValueUpdate>();
newValues.put(
"count", new AttributeValueUpdate(new AttributeValue().withN("102"), AttributeAction.PUT));
HashMap<String, ExpectedAttributeValue> expectedValues =
new HashMap<String, ExpectedAttributeValue>();
expectedValues.put(
"count", new ExpectedAttributeValue().withValue(new AttributeValue().withN("10")));
update =
new UpdateItemRequest()
.withTableName(tableName)
.withKey(key)
.withAttributeUpdates(newValues)
.withExpected(expectedValues);
try {
getClient().updateItem(update);
inProcessClient.save(PERSISTENCE_PATH);
createNewInProcessClient().restore(PERSISTENCE_PATH);
Assert.fail("expecting conditional check exception");
} catch (ConditionalCheckFailedException e) {
// expect this exception
}
}
public Request<BatchGetItemRequest> marshall(BatchGetItemRequest batchGetItemRequest) {
if (batchGetItemRequest == null) {
throw new AmazonClientException("Invalid argument passed to marshall(...)");
}
Request<BatchGetItemRequest> request =
new DefaultRequest<BatchGetItemRequest>(batchGetItemRequest, "AmazonDynamoDB");
String target = "DynamoDB_20111205.BatchGetItem";
request.addHeader("X-Amz-Target", target);
request.addHeader("Content-Type", "application/x-amz-json-1.0");
request.setHttpMethod(HttpMethodName.POST);
String uriResourcePath = "";
uriResourcePath = uriResourcePath.replaceAll("//", "/");
if (uriResourcePath.contains("?")) {
String queryString = uriResourcePath.substring(uriResourcePath.indexOf("?") + 1);
uriResourcePath = uriResourcePath.substring(0, uriResourcePath.indexOf("?"));
for (String s : queryString.split("[;&]")) {
String[] nameValuePair = s.split("=");
if (nameValuePair.length == 2) {
request.addParameter(nameValuePair[0], nameValuePair[1]);
} else {
request.addParameter(s, null);
}
}
}
request.setResourcePath(uriResourcePath);
try {
StringWriter stringWriter = new StringWriter();
JSONWriter jsonWriter = new JSONWriter(stringWriter);
jsonWriter.object();
if (batchGetItemRequest.getRequestItems() != null) {
jsonWriter.key("RequestItems");
jsonWriter.object();
for (Map.Entry<String, KeysAndAttributes> requestItemsListValue :
batchGetItemRequest.getRequestItems().entrySet()) {
if (requestItemsListValue.getValue() != null) {
jsonWriter.key(requestItemsListValue.getKey());
jsonWriter.object();
java.util.List<Key> keysList = requestItemsListValue.getValue().getKeys();
if (keysList != null && keysList.size() > 0) {
jsonWriter.key("Keys");
jsonWriter.array();
for (Key keysListValue : keysList) {
if (keysListValue != null) {
jsonWriter.object();
AttributeValue hashKeyElement = keysListValue.getHashKeyElement();
if (hashKeyElement != null) {
jsonWriter.key("HashKeyElement");
jsonWriter.object();
if (hashKeyElement.getS() != null) {
jsonWriter.key("S").value(hashKeyElement.getS());
}
if (hashKeyElement.getN() != null) {
jsonWriter.key("N").value(hashKeyElement.getN());
}
if (hashKeyElement.getB() != null) {
jsonWriter.key("B").value(hashKeyElement.getB());
}
java.util.List<String> sSList = hashKeyElement.getSS();
if (sSList != null && sSList.size() > 0) {
jsonWriter.key("SS");
jsonWriter.array();
for (String sSListValue : sSList) {
if (sSListValue != null) {
jsonWriter.value(sSListValue);
}
}
jsonWriter.endArray();
}
java.util.List<String> nSList = hashKeyElement.getNS();
if (nSList != null && nSList.size() > 0) {
jsonWriter.key("NS");
jsonWriter.array();
for (String nSListValue : nSList) {
if (nSListValue != null) {
jsonWriter.value(nSListValue);
}
}
jsonWriter.endArray();
}
java.util.List<java.nio.ByteBuffer> bSList = hashKeyElement.getBS();
if (bSList != null && bSList.size() > 0) {
jsonWriter.key("BS");
jsonWriter.array();
for (java.nio.ByteBuffer bSListValue : bSList) {
if (bSListValue != null) {
jsonWriter.value(bSListValue);
}
}
jsonWriter.endArray();
}
jsonWriter.endObject();
}
AttributeValue rangeKeyElement = keysListValue.getRangeKeyElement();
if (rangeKeyElement != null) {
jsonWriter.key("RangeKeyElement");
jsonWriter.object();
if (rangeKeyElement.getS() != null) {
jsonWriter.key("S").value(rangeKeyElement.getS());
}
if (rangeKeyElement.getN() != null) {
jsonWriter.key("N").value(rangeKeyElement.getN());
}
if (rangeKeyElement.getB() != null) {
jsonWriter.key("B").value(rangeKeyElement.getB());
}
java.util.List<String> sSList = rangeKeyElement.getSS();
if (sSList != null && sSList.size() > 0) {
jsonWriter.key("SS");
jsonWriter.array();
for (String sSListValue : sSList) {
if (sSListValue != null) {
jsonWriter.value(sSListValue);
}
}
jsonWriter.endArray();
}
java.util.List<String> nSList = rangeKeyElement.getNS();
if (nSList != null && nSList.size() > 0) {
jsonWriter.key("NS");
jsonWriter.array();
for (String nSListValue : nSList) {
if (nSListValue != null) {
jsonWriter.value(nSListValue);
}
}
jsonWriter.endArray();
}
java.util.List<java.nio.ByteBuffer> bSList = rangeKeyElement.getBS();
if (bSList != null && bSList.size() > 0) {
jsonWriter.key("BS");
jsonWriter.array();
for (java.nio.ByteBuffer bSListValue : bSList) {
if (bSListValue != null) {
jsonWriter.value(bSListValue);
}
}
jsonWriter.endArray();
}
jsonWriter.endObject();
}
jsonWriter.endObject();
}
}
jsonWriter.endArray();
}
java.util.List<String> attributesToGetList =
requestItemsListValue.getValue().getAttributesToGet();
if (attributesToGetList != null && attributesToGetList.size() > 0) {
jsonWriter.key("AttributesToGet");
jsonWriter.array();
for (String attributesToGetListValue : attributesToGetList) {
if (attributesToGetListValue != null) {
jsonWriter.value(attributesToGetListValue);
}
}
jsonWriter.endArray();
}
if (requestItemsListValue.getValue().isConsistentRead() != null) {
jsonWriter
.key("ConsistentRead")
.value(requestItemsListValue.getValue().isConsistentRead());
}
jsonWriter.endObject();
}
}
jsonWriter.endObject();
}
jsonWriter.endObject();
String snippet = stringWriter.toString();
byte[] content = snippet.getBytes("UTF-8");
request.setContent(new StringInputStream(snippet));
request.addHeader("Content-Length", Integer.toString(content.length));
} catch (Throwable t) {
throw new AmazonClientException("Unable to marshall request to JSON: " + t.getMessage(), t);
}
return request;
}