Examples with Index com.amazonaws.services.dynamodbv2.document.Index used on opensource projects

Example 6 with Index

use of com.amazonaws.services.dynamodbv2.document.Index in project aws-doc-sdk-examples by awsdocs.

the class LowLevelGlobalSecondaryIndexExample method queryIndex.

public static void queryIndex(String indexName) {
    System.out.println("\n***********************************************************\n");
    System.out.print("Querying index " + indexName + "...");
    QueryRequest queryRequest = new QueryRequest().withTableName(tableName).withIndexName(indexName).withScanIndexForward(true);
    HashMap<String, Condition> keyConditions = new HashMap<String, Condition>();
    if (indexName == "CreateDateIndex") {
        System.out.println("Issues filed on 2013-11-01");
        keyConditions.put("CreateDate", new Condition().withComparisonOperator(ComparisonOperator.EQ).withAttributeValueList(new AttributeValue().withS("2013-11-01")));
        keyConditions.put("IssueId", new Condition().withComparisonOperator(ComparisonOperator.BEGINS_WITH).withAttributeValueList(new AttributeValue().withS("A-")));
    } else if (indexName == "TitleIndex") {
        System.out.println("Compilation errors");
        keyConditions.put("Title", new Condition().withComparisonOperator(ComparisonOperator.EQ).withAttributeValueList(new AttributeValue().withS("Compilation error")));
        keyConditions.put("IssueId", new Condition().withComparisonOperator(ComparisonOperator.BEGINS_WITH).withAttributeValueList(new AttributeValue().withS("A-")));
        // Select
        queryRequest.setSelect(Select.ALL_PROJECTED_ATTRIBUTES);
    } else if (indexName == "DueDateIndex") {
        System.out.println("Items that are due on 2013-11-30");
        keyConditions.put("DueDate", new Condition().withComparisonOperator(ComparisonOperator.EQ).withAttributeValueList(new AttributeValue().withS("2013-11-30")));
        // Select
        queryRequest.setSelect(Select.ALL_PROJECTED_ATTRIBUTES);
    } else {
        System.out.println("\nNo valid index name provided");
        return;
    }
    queryRequest.setKeyConditions(keyConditions);
    QueryResult result = client.query(queryRequest);
    List<Map<String, AttributeValue>> items = result.getItems();
    Iterator<Map<String, AttributeValue>> itemsIter = items.iterator();
    System.out.println();
    while (itemsIter.hasNext()) {
        Map<String, AttributeValue> currentItem = itemsIter.next();
        Iterator<String> currentItemIter = currentItem.keySet().iterator();
        while (currentItemIter.hasNext()) {
            String attr = (String) currentItemIter.next();
            if (attr == "Priority") {
                System.out.println(attr + "---> " + currentItem.get(attr).getN());
            } else {
                System.out.println(attr + "---> " + currentItem.get(attr).getS());
            }
        }
        System.out.println();
    }
}

Example 7 with Index

use of com.amazonaws.services.dynamodbv2.document.Index in project aws-doc-sdk-examples by awsdocs.

the class LowLevelLocalSecondaryIndexExample method query.

public static void query(String indexName) {
    System.out.println("\n***********************************************************\n");
    System.out.println("Querying table " + tableName + "...");
    QueryRequest queryRequest = new QueryRequest().withTableName(tableName).withConsistentRead(true).withScanIndexForward(true).withReturnConsumedCapacity(ReturnConsumedCapacity.TOTAL);
    HashMap<String, Condition> keyConditions = new HashMap<String, Condition>();
    keyConditions.put("CustomerId", new Condition().withComparisonOperator(ComparisonOperator.EQ).withAttributeValueList(new AttributeValue().withS("bob@example.com")));
    if (indexName == "IsOpenIndex") {
        System.out.println("\nUsing index: '" + indexName + "': Bob's orders that are open.");
        System.out.println("Only a user-specified list of attributes are returned\n");
        queryRequest.setIndexName(indexName);
        keyConditions.put("IsOpen", new Condition().withComparisonOperator(ComparisonOperator.EQ).withAttributeValueList(new AttributeValue().withN("1")));
        // ProjectionExpression
        queryRequest.setProjectionExpression("OrderCreationDate, ProductCategory, ProductName, OrderStatus");
    } else if (indexName == "OrderCreationDateIndex") {
        System.out.println("\nUsing index: '" + indexName + "': Bob's orders that were placed after 01/31/2013.");
        System.out.println("Only the projected attributes are returned\n");
        queryRequest.setIndexName(indexName);
        keyConditions.put("OrderCreationDate", new Condition().withComparisonOperator(ComparisonOperator.GT).withAttributeValueList(new AttributeValue().withN("20130131")));
        // Select
        queryRequest.setSelect(Select.ALL_PROJECTED_ATTRIBUTES);
    } else {
        System.out.println("\nNo index: All of Bob's orders, by OrderId:\n");
    }
    queryRequest.setKeyConditions(keyConditions);
    QueryResult result = client.query(queryRequest);
    List<Map<String, AttributeValue>> items = result.getItems();
    Iterator<Map<String, AttributeValue>> itemsIter = items.iterator();
    while (itemsIter.hasNext()) {
        Map<String, AttributeValue> currentItem = itemsIter.next();
        Iterator<String> currentItemIter = currentItem.keySet().iterator();
        while (currentItemIter.hasNext()) {
            String attr = (String) currentItemIter.next();
            if (attr == "OrderId" || attr == "IsOpen" || attr == "OrderCreationDate") {
                System.out.println(attr + "---> " + currentItem.get(attr).getN());
            } else {
                System.out.println(attr + "---> " + currentItem.get(attr).getS());
            }
        }
        System.out.println();
    }
    System.out.println("\nConsumed capacity: " + result.getConsumedCapacity() + "\n");
}

Example 8 with Index

use of com.amazonaws.services.dynamodbv2.document.Index in project openhab1-addons by openhab.

the class DynamoDBPersistenceService method query.

/**
     * {@inheritDoc}
     */
@Override
public Iterable<HistoricItem> query(FilterCriteria filter) {
    logger.debug("got a query");
    if (!isProperlyConfigured) {
        logger.warn("Configuration for dynamodb not yet loaded or broken. Not storing item.");
        return Collections.emptyList();
    }
    if (!maybeConnectAndCheckConnection()) {
        logger.warn("DynamoDB not connected. Not storing item.");
        return Collections.emptyList();
    }
    String itemName = filter.getItemName();
    Item item = getItemFromRegistry(itemName);
    if (item == null) {
        logger.warn("Could not get item {} from registry!", itemName);
        return Collections.emptyList();
    }
    Class<DynamoDBItem<?>> dtoClass = AbstractDynamoDBItem.getDynamoItemClass(item.getClass());
    String tableName = tableNameResolver.fromClass(dtoClass);
    DynamoDBMapper mapper = getDBMapper(tableName);
    logger.debug("item {} (class {}) will be tried to query using dto class {} from table {}", itemName, item.getClass(), dtoClass, tableName);
    List<HistoricItem> historicItems = new ArrayList<HistoricItem>();
    DynamoDBQueryExpression<DynamoDBItem<?>> queryExpression = createQueryExpression(dtoClass, filter);
    @SuppressWarnings("rawtypes") final PaginatedQueryList<? extends DynamoDBItem> paginatedList;
    try {
        paginatedList = mapper.query(dtoClass, queryExpression);
    } catch (AmazonServiceException e) {
        logger.error("DynamoDB query raised unexpected exception: {}. Returning empty collection. " + "Status code 400 (resource not found) might occur if table was just created.", e.getMessage());
        return Collections.emptyList();
    }
    for (int itemIndexOnPage = 0; itemIndexOnPage < filter.getPageSize(); itemIndexOnPage++) {
        int itemIndex = filter.getPageNumber() * filter.getPageSize() + itemIndexOnPage;
        DynamoDBItem<?> dynamoItem;
        try {
            dynamoItem = paginatedList.get(itemIndex);
        } catch (IndexOutOfBoundsException e) {
            logger.debug("Index {} is out-of-bounds", itemIndex);
            break;
        }
        if (dynamoItem != null) {
            HistoricItem historicItem = dynamoItem.asHistoricItem(item);
            logger.trace("Dynamo item {} converted to historic item: {}", item, historicItem);
            historicItems.add(historicItem);
        }
    }
    return historicItems;
}

Example 9 with Index

use of com.amazonaws.services.dynamodbv2.document.Index in project aws-doc-sdk-examples by awsdocs.

the class CreateTablesLoadData method createTable.

private static void createTable(String tableName, long readCapacityUnits, long writeCapacityUnits, String partitionKeyName, String partitionKeyType, String sortKeyName, String sortKeyType) {
    try {
        ArrayList<KeySchemaElement> keySchema = new ArrayList<KeySchemaElement>();
        // Partition
        keySchema.add(new KeySchemaElement().withAttributeName(partitionKeyName).withKeyType(KeyType.HASH));
        // key
        ArrayList<AttributeDefinition> attributeDefinitions = new ArrayList<AttributeDefinition>();
        attributeDefinitions.add(new AttributeDefinition().withAttributeName(partitionKeyName).withAttributeType(partitionKeyType));
        if (sortKeyName != null) {
            // Sort
            keySchema.add(new KeySchemaElement().withAttributeName(sortKeyName).withKeyType(KeyType.RANGE));
            // key
            attributeDefinitions.add(new AttributeDefinition().withAttributeName(sortKeyName).withAttributeType(sortKeyType));
        }
        CreateTableRequest request = new CreateTableRequest().withTableName(tableName).withKeySchema(keySchema).withProvisionedThroughput(new ProvisionedThroughput().withReadCapacityUnits(readCapacityUnits).withWriteCapacityUnits(writeCapacityUnits));
        // If this is the Reply table, define a local secondary index
        if (replyTableName.equals(tableName)) {
            attributeDefinitions.add(new AttributeDefinition().withAttributeName("PostedBy").withAttributeType("S"));
            ArrayList<LocalSecondaryIndex> localSecondaryIndexes = new ArrayList<LocalSecondaryIndex>();
            localSecondaryIndexes.add(new LocalSecondaryIndex().withIndexName("PostedBy-Index").withKeySchema(// Partition
            new KeySchemaElement().withAttributeName(partitionKeyName).withKeyType(KeyType.HASH), // key
            new KeySchemaElement().withAttributeName("PostedBy").withKeyType(// Sort
            KeyType.RANGE)).withProjection(new Projection().withProjectionType(ProjectionType.KEYS_ONLY)));
            request.setLocalSecondaryIndexes(localSecondaryIndexes);
        }
        request.setAttributeDefinitions(attributeDefinitions);
        System.out.println("Issuing CreateTable request for " + tableName);
        Table table = dynamoDB.createTable(request);
        System.out.println("Waiting for " + tableName + " to be created...this may take a while...");
        table.waitForActive();
    } catch (Exception e) {
        System.err.println("CreateTable request failed for " + tableName);
        System.err.println(e.getMessage());
    }
}

Example 10 with Index

use of com.amazonaws.services.dynamodbv2.document.Index in project aws-doc-sdk-examples by awsdocs.

the class SampleDataLoad method loadSampleThreads.

private static void loadSampleThreads(String tableName) {
    try {
        // 7
        long time1 = (new Date()).getTime() - (7 * 24 * 60 * 60 * 1000);
        // days
        // ago
        // 14
        long time2 = (new Date()).getTime() - (14 * 24 * 60 * 60 * 1000);
        // days
        // ago
        // 21
        long time3 = (new Date()).getTime() - (21 * 24 * 60 * 60 * 1000);
        // days
        // ago
        Date date1 = new Date();
        date1.setTime(time1);
        Date date2 = new Date();
        date2.setTime(time2);
        Date date3 = new Date();
        date3.setTime(time3);
        dateFormatter.setTimeZone(TimeZone.getTimeZone("UTC"));
        Table table = dynamoDB.getTable(tableName);
        System.out.println("Adding data to " + tableName);
        Item item = new Item().withPrimaryKey("ForumName", "Amazon DynamoDB").withString("Subject", "DynamoDB Thread 1").withString("Message", "DynamoDB thread 1 message").withString("LastPostedBy", "User A").withString("LastPostedDateTime", dateFormatter.format(date2)).withNumber("Views", 0).withNumber("Replies", 0).withNumber("Answered", 0).withStringSet("Tags", new HashSet<String>(Arrays.asList("index", "primarykey", "table")));
        table.putItem(item);
        item = new Item().withPrimaryKey("ForumName", "Amazon DynamoDB").withString("Subject", "DynamoDB Thread 2").withString("Message", "DynamoDB thread 2 message").withString("LastPostedBy", "User A").withString("LastPostedDateTime", dateFormatter.format(date3)).withNumber("Views", 0).withNumber("Replies", 0).withNumber("Answered", 0).withStringSet("Tags", new HashSet<String>(Arrays.asList("index", "partitionkey", "sortkey")));
        table.putItem(item);
        item = new Item().withPrimaryKey("ForumName", "Amazon S3").withString("Subject", "S3 Thread 1").withString("Message", "S3 Thread 3 message").withString("LastPostedBy", "User A").withString("LastPostedDateTime", dateFormatter.format(date1)).withNumber("Views", 0).withNumber("Replies", 0).withNumber("Answered", 0).withStringSet("Tags", new HashSet<String>(Arrays.asList("largeobjects", "multipart upload")));
        table.putItem(item);
    } catch (Exception e) {
        System.err.println("Failed to create item in " + tableName);
        System.err.println(e.getMessage());
    }
}