private void printNodeHistoryItems(String nid, String time) {
String hashKey = nid;
String rangeKey = time;
NodeHistory nhKey = new NodeHistory();
nhKey.setNodeID(hashKey);
List<NodeHistory> latestNodeHistory;
if (time != null) {
Condition rangeKeyCondition =
new Condition()
.withComparisonOperator(ComparisonOperator.EQ.toString())
.withAttributeValueList(new AttributeValue().withS(rangeKey));
DynamoDBQueryExpression<NodeHistory> queryExpression =
new DynamoDBQueryExpression<NodeHistory>()
.withHashKeyValues(nhKey)
.withRangeKeyCondition("Time", rangeKeyCondition);
latestNodeHistory = mapper.query(NodeHistory.class, queryExpression);
} else {
DynamoDBQueryExpression<NodeHistory> queryExpression =
new DynamoDBQueryExpression<NodeHistory>().withHashKeyValues(nhKey);
latestNodeHistory = mapper.query(NodeHistory.class, queryExpression);
}
for (NodeHistory nh : latestNodeHistory) {
System.out.format(
"SerialNumber=%s, Time=%s, SAValues=%s\n",
nh.getNodeID(), nh.getTime(), nh.getSAValues());
}
}
@Test
public void queryWithUnknownHashRangeKey2() {
putItemWithHashKeyAndRangeKey();
String hashCode = "hash2";
Condition rangeKeyCondition = new Condition();
List<AttributeValue> attributeValueList = new ArrayList<AttributeValue>();
attributeValueList.add(new AttributeValue().withS("range2x"));
attributeValueList.add(new AttributeValue().withS("range2y"));
rangeKeyCondition.setAttributeValueList(attributeValueList);
rangeKeyCondition.setComparisonOperator(ComparisonOperator.BETWEEN);
TestClassWithHashRangeKey hashKeyTemplate = new TestClassWithHashRangeKey();
hashKeyTemplate.setHashCode(hashCode);
DynamoDBQueryExpression<TestClassWithHashRangeKey> query =
new DynamoDBQueryExpression<TestClassWithHashRangeKey>()
.withHashKeyValues(hashKeyTemplate)
.withRangeKeyCondition("rangeCode", rangeKeyCondition);
List<TestClassWithHashRangeKey> valueList =
mapper.query(TestClassWithHashRangeKey.class, query);
Assert.assertNotNull("Value list is null.", valueList);
Assert.assertEquals("Value list should be empty.", 0, valueList.size());
}
@Test
public void queryWithHashKey() {
putItemWithHashKey();
putItemWithHashKeyOverwriteItem();
String code = "hash1";
TestClassWithHashKey hashKeyTemplate = new TestClassWithHashKey();
hashKeyTemplate.setCode(code);
Map<String, Condition> emptyRangeConditions = new HashMap<String, Condition>();
DynamoDBQueryExpression<TestClassWithHashKey> query =
new DynamoDBQueryExpression<TestClassWithHashKey>()
.withHashKeyValues(hashKeyTemplate)
.withRangeKeyConditions(emptyRangeConditions);
List<TestClassWithHashKey> valueList = mapper.query(TestClassWithHashKey.class, query);
Assert.assertNotNull("Value list is null.", valueList);
Assert.assertNotSame("Value list is empty.", 0, valueList.size());
Assert.assertEquals("Value list has more than one item.", 1, valueList.size());
TestClassWithHashKey value = valueList.get(0);
Assert.assertEquals("Wrong code.", code, value.getCode());
Assert.assertEquals("Wrong stringData.", "string1", value.getStringData());
Assert.assertEquals("Wrong intData.", 1, value.getIntData());
Assert.assertEquals(
"Wrong stringSetData.", set("stringSetVal1", "stringSetVal2"), value.getStringSetData());
Assert.assertEquals("Wrong numberSetData.", set(1, 2), value.getNumberSetData());
}
private void createNodeHistoryItems(
NodeHistory nHistoryDB, String nid, String time, String values) {
nHistoryDB.setNodeID(nid);
nHistoryDB.setTime(time);
nHistoryDB.setSAValues(values);
mapper.save(nHistoryDB);
String hashKey = nid;
String rangeKey = time;
NodeHistory nhKey = new NodeHistory();
nhKey.setNodeID(hashKey);
Condition rangeKeyCondition =
new Condition()
.withComparisonOperator(ComparisonOperator.EQ.toString())
.withAttributeValueList(new AttributeValue().withS(rangeKey));
DynamoDBQueryExpression<NodeHistory> queryExpression =
new DynamoDBQueryExpression<NodeHistory>()
.withHashKeyValues(nhKey)
.withRangeKeyCondition("Time", rangeKeyCondition);
List<NodeHistory> latestNodeHistory = mapper.query(NodeHistory.class, queryExpression);
System.out.println("Item created: ");
for (NodeHistory nh : latestNodeHistory) {
System.out.format(
"SerialNumber=%s, Time=%s, SAValues=%s\n",
nh.getNodeID(), nh.getTime(), nh.getSAValues());
}
}
// range format example = (7L*24L*60L*60L*1000L) (1 week)
public List<NodeHistoryEntity> findSpecificNodeHistoryInRangeTime(String nid, Long range) {
String hashKey = nid;
SimpleDateFormat dateFormatter = new SimpleDateFormat("yyyy-MMdd'T'HH:mm:ss.SSS'Z'");
Long currentTimeMilli = (new Date()).getTime();
Long rangeTimeMilli = (new Date()).getTime() - range;
dateFormatter.setTimeZone(TimeZone.getTimeZone("UTC"));
String currentTime = dateFormatter.format(currentTimeMilli);
String rangeTime = dateFormatter.format(rangeTimeMilli);
NodeHistory nhKey = new NodeHistory();
nhKey.setNodeID(hashKey);
List<NodeHistory> latestNodeHistory;
Condition rangeKeyCondition =
new Condition()
.withComparisonOperator(ComparisonOperator.BETWEEN.toString())
.withAttributeValueList(
new AttributeValue().withS(currentTime), new AttributeValue().withS(rangeTime));
DynamoDBQueryExpression<NodeHistory> queryExpression =
new DynamoDBQueryExpression<NodeHistory>()
.withHashKeyValues(nhKey)
.withRangeKeyCondition("Time", rangeKeyCondition);
latestNodeHistory = mapper.query(NodeHistory.class, queryExpression);
return this.transform(latestNodeHistory);
}
/**
* Returns list of all items that are in cart for that user.
*
* @param userId
* @return
*/
public List<CartItem> getCartItemsFromUserId(int userId) {
// Declare mapper
DynamoDBMapper mapper = this.conn.getMapper();
// Create hash key values which to form a query
CartItem hashKeyValues = new CartItem();
hashKeyValues.setUserId(userId);
// Form a query
DynamoDBQueryExpression<CartItem> queryExpression =
new DynamoDBQueryExpression<CartItem>()
.withHashKeyValues(hashKeyValues)
.withQueryFilterEntry(
"IsOrdered",
new Condition()
.withComparisonOperator(ComparisonOperator.EQ)
.withAttributeValueList(new AttributeValue().withN("0")));
// add query filter
queryExpression.setHashKeyValues(hashKeyValues);
// execute that query
List<CartItem> itemList = mapper.query(CartItem.class, queryExpression);
for (int i = 0; i < itemList.size(); i++) {
System.out.println(itemList.get(i).getUserId());
System.out.println(itemList.get(i).getCartId());
System.out.println(itemList.get(i).getProductId());
System.out.println(itemList.get(i).getQuantity());
}
// return the first item (we will have only one item)
return itemList;
}
@Test
public void limitTest() {
createGenericHashRangeTable(hashRangeTableName, "hashCode", "rangeCode");
for (int i = 0; i < 10; i++) {
TestClassWithHashRangeKey c = new TestClassWithHashRangeKey();
c.setHashCode("code");
c.setRangeCode(i + "");
mapper.save(c);
}
String code = "code";
TestClassWithHashRangeKey hashKeyTemplate = new TestClassWithHashRangeKey();
hashKeyTemplate.setHashCode(code);
Map<String, Condition> emptyRangeConditions = new HashMap<String, Condition>();
DynamoDBQueryExpression<TestClassWithHashRangeKey> query1 =
new DynamoDBQueryExpression<TestClassWithHashRangeKey>()
.withHashKeyValues(hashKeyTemplate)
.withRangeKeyConditions(emptyRangeConditions)
.withLimit(1);
DynamoDBQueryExpression<TestClassWithHashRangeKey> query3 =
new DynamoDBQueryExpression<TestClassWithHashRangeKey>()
.withHashKeyValues(hashKeyTemplate)
.withRangeKeyConditions(emptyRangeConditions)
.withLimit(3);
DynamoDBQueryExpression<TestClassWithHashRangeKey> query20 =
new DynamoDBQueryExpression<TestClassWithHashRangeKey>()
.withHashKeyValues(hashKeyTemplate)
.withRangeKeyConditions(emptyRangeConditions)
.withLimit(20);
Assert.assertEquals(1, mapper.query(TestClassWithHashRangeKey.class, query1).size());
Assert.assertEquals(3, mapper.query(TestClassWithHashRangeKey.class, query3).size());
Assert.assertEquals(10, mapper.query(TestClassWithHashRangeKey.class, query20).size());
}
private List<NodeHistoryEntity> findNodeHistories(String nid, String time) {
String hashKey = nid;
String rangeKey = time;
NodeHistory nhKey = new NodeHistory();
nhKey.setNodeID(hashKey);
List<NodeHistory> latestNodeHistory;
if (time != null) {
Condition rangeKeyCondition =
new Condition()
.withComparisonOperator(ComparisonOperator.EQ.toString())
.withAttributeValueList(new AttributeValue().withS(rangeKey));
DynamoDBQueryExpression<NodeHistory> queryExpression =
new DynamoDBQueryExpression<NodeHistory>()
.withHashKeyValues(nhKey)
.withRangeKeyCondition("Time", rangeKeyCondition);
latestNodeHistory = mapper.query(NodeHistory.class, queryExpression);
} else {
DynamoDBQueryExpression<NodeHistory> queryExpression =
new DynamoDBQueryExpression<NodeHistory>().withHashKeyValues(nhKey);
latestNodeHistory = mapper.query(NodeHistory.class, queryExpression);
}
List<NodeHistoryEntity> list = new ArrayList<>();
for (NodeHistory n : latestNodeHistory) {
NodeHistoryEntity ret = new NodeHistoryEntity();
ret.setNID(n.getNodeID());
ret.setTime(n.getTime());
ret.setSAValues(n.getSAValues());
list.add(ret);
}
return list;
}
@Test
public void queryWithUnknownHashKey() {
putItemWithHashKey();
String code = "hash1x";
TestClassWithHashKey hashKeyTemplate = new TestClassWithHashKey();
hashKeyTemplate.setCode(code);
Map<String, Condition> emptyRangeConditions = new HashMap<String, Condition>();
DynamoDBQueryExpression<TestClassWithHashKey> query =
new DynamoDBQueryExpression<TestClassWithHashKey>()
.withHashKeyValues(hashKeyTemplate)
.withRangeKeyConditions(emptyRangeConditions);
List<TestClassWithHashKey> valueList = mapper.query(TestClassWithHashKey.class, query);
Assert.assertNotNull("Value list is null.", valueList);
Assert.assertEquals("Value list should be empty.", 0, valueList.size());
}
@Test
public void scanIndexForwardFalseTest() {
createTable(
hashRangeTableName,
createStringAttributeDefinition("hashCode"),
createStringAttributeDefinition("rangeCode"));
{
TestClassWithHashRangeKey c = new TestClassWithHashRangeKey();
c.setHashCode("code");
c.setRangeCode("1");
c.setStringData("first");
mapper.save(c);
}
{
TestClassWithHashRangeKey c = new TestClassWithHashRangeKey();
c.setHashCode("code");
c.setRangeCode("2");
c.setStringData("second");
mapper.save(c);
}
String code = "code";
TestClassWithHashRangeKey hashKeyTemplate = new TestClassWithHashRangeKey();
hashKeyTemplate.setHashCode(code);
Map<String, Condition> emptyRangeConditions = new HashMap<String, Condition>();
DynamoDBQueryExpression<TestClassWithHashRangeKey> query =
new DynamoDBQueryExpression<TestClassWithHashRangeKey>()
.withHashKeyValues(hashKeyTemplate)
.withRangeKeyConditions(emptyRangeConditions)
.withScanIndexForward(false)
.withLimit(1);
TestClassWithHashRangeKey res = mapper.query(TestClassWithHashRangeKey.class, query).get(0);
Assert.assertEquals("second", res.getStringData());
}
@Test
public void queryWithUnknownHashRangeKey1() {
putItemWithHashKeyAndRangeKey();
String hashCode = "hash1x";
TestClassWithHashRangeKey hashKeyTemplate = new TestClassWithHashRangeKey();
hashKeyTemplate.setHashCode(hashCode);
Condition rangeKeyCondition =
new Condition().withComparisonOperator(ComparisonOperator.NOT_NULL);
DynamoDBQueryExpression<TestClassWithHashRangeKey> query =
new DynamoDBQueryExpression<TestClassWithHashRangeKey>()
.withHashKeyValues(hashKeyTemplate)
.withRangeKeyCondition("rangeCode", rangeKeyCondition);
List<TestClassWithHashRangeKey> valueList =
mapper.query(TestClassWithHashRangeKey.class, query);
Assert.assertNotNull("Value list is null.", valueList);
Assert.assertEquals("Value list should be empty.", 0, valueList.size());
}
@Test
public void queryWithHashRangeKey() {
putItemWithHashKeyAndRangeKey();
TestClassWithHashRangeKey value2c = new TestClassWithHashRangeKey();
value2c.setHashCode("hash2");
value2c.setRangeCode("range2c");
value2c.setStringData("string2c");
value2c.setIntData(23);
value2c.setStringSetData(set("stringSetVal2c1", "stringSetVal2c2"));
value2c.setNumberSetData(set(7, 8));
mapper.save(value2c);
TestClassWithHashRangeKey value2d = new TestClassWithHashRangeKey();
value2d.setHashCode("hash2");
value2d.setRangeCode("range2d");
value2d.setStringData("string2d");
value2d.setIntData(24);
value2d.setStringSetData(set("stringSetVal2d1", "stringSetVal2d2"));
value2d.setNumberSetData(set(9, 10));
mapper.save(value2d);
TestClassWithHashRangeKey value2e = new TestClassWithHashRangeKey();
value2e.setHashCode("hash2");
value2e.setRangeCode("range2e");
value2e.setStringData("string2e");
value2e.setIntData(25);
value2e.setStringSetData(set("stringSetVal2e1", "stringSetVal2e2"));
value2e.setNumberSetData(set(11, 12));
mapper.save(value2e);
String hashCode = "hash2";
TestClassWithHashRangeKey hashKeyTemplate = new TestClassWithHashRangeKey();
hashKeyTemplate.setHashCode(hashCode);
Condition rangeKeyCondition = new Condition();
List<AttributeValue> rangeValues = new ArrayList<AttributeValue>();
rangeValues.add(new AttributeValue().withS("range2c"));
rangeValues.add(new AttributeValue().withS("range2d"));
rangeKeyCondition.setComparisonOperator(ComparisonOperator.BETWEEN);
rangeKeyCondition.setAttributeValueList(rangeValues);
DynamoDBQueryExpression<TestClassWithHashRangeKey> query =
new DynamoDBQueryExpression<TestClassWithHashRangeKey>()
.withHashKeyValues(hashKeyTemplate)
.withRangeKeyCondition("rangeCode", rangeKeyCondition);
List<TestClassWithHashRangeKey> valueList =
mapper.query(TestClassWithHashRangeKey.class, query);
Assert.assertNotNull("Value list is null.", valueList);
Assert.assertNotSame("Value list is empty.", 0, valueList.size());
Assert.assertEquals("Value list should have 2 items.", 2, valueList.size());
TestClassWithHashRangeKey value = valueList.get(0);
Assert.assertEquals("Wrong hashCode.", hashCode, value.getHashCode());
Assert.assertEquals("Wrong rangeCode.", "range2c", value.getRangeCode());
Assert.assertEquals("Wrong stringData.", "string2c", value.getStringData());
Assert.assertEquals("Wrong intData.", 23, value.getIntData());
Assert.assertEquals(
"Wrong stringSetData.",
set("stringSetVal2c1", "stringSetVal2c2"),
value.getStringSetData());
Assert.assertEquals("Wrong numberSetData.", set(7, 8), value.getNumberSetData());
value = valueList.get(1);
Assert.assertEquals("Wrong hashCode.", hashCode, value.getHashCode());
Assert.assertEquals("Wrong rangeCode.", "range2d", value.getRangeCode());
Assert.assertEquals("Wrong stringData.", "string2d", value.getStringData());
Assert.assertEquals("Wrong intData.", 24, value.getIntData());
Assert.assertEquals(
"Wrong stringSetData.",
set("stringSetVal2d1", "stringSetVal2d2"),
value.getStringSetData());
Assert.assertEquals("Wrong numberSetData.", set(9, 10), value.getNumberSetData());
}