Example usage for com.amazonaws.services.dynamodbv2.document Table getItem

List of usage examples for com.amazonaws.services.dynamodbv2.document Table getItem

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Introduction

In this page you can find the example usage for com.amazonaws.services.dynamodbv2.document Table getItem.

Prototype

@Override
    public Item getItem(String hashKeyName, Object hashKeyValue)

Source Link

Usage

From source file:com.achow101.bittipaddr.server.addressServiceImpl.java

License:Open Source License

@Override
public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    // Get the id
    String requestURI = request.getRequestURI();
    String id = requestURI.substring(requestURI.lastIndexOf("/") + 1);

    // Setup the aws dynamo db client
    AmazonDynamoDBClient client = new AmazonDynamoDBClient();
    DynamoDB dynamoDB = new DynamoDB(client);

    // Setup blockcypher API
    BlockCypherContext blockCypherContext = new BlockCypherContext("v1", "btc", "main",
            "4d3109a5c07f426da9ccc2943da39244");

    // Lookup ID and get current address, increment index
    String address = "";
    Table table = dynamoDB.getTable("Bittipaddrs");
    int currAddrInx = 0;
    try {/*w  ww .  j  a v  a 2s. c  o  m*/
        Item item = table.getItem("ID", id);
        currAddrInx = item.getInt("AddrIndex");
        int origIndx = currAddrInx;
        List<String> addresses = item.getList("Addresses");
        if (currAddrInx < addresses.size()) {
            address = addresses.get(currAddrInx);

            while (blockCypherContext.getAddressService().getAddress(address).getnTx() > 0
                    && currAddrInx < addresses.size()) {
                // Increment index and get next address
                currAddrInx++;
                address = addresses.get(currAddrInx);

                // Wait one third of a second to prevent rate limiting
                Thread.sleep(334);
            }
        } else {
            address = addresses.get(addresses.size() - 1);
        }

        // Update index if DB if it has changed
        if (currAddrInx != origIndx) {
            UpdateItemSpec updateItemSpec = new UpdateItemSpec().withPrimaryKey("ID", id)
                    .withUpdateExpression("set AddrIndex=:i")
                    .withValueMap(new ValueMap().withNumber(":i", currAddrInx));
            table.updateItem(updateItemSpec);
        }
    }
    // Deal with rate limiting from BlockCypher
    catch (BlockCypherException e) {
        UpdateItemSpec updateItemSpec = new UpdateItemSpec().withPrimaryKey("ID", id)
                .withUpdateExpression("set AddrIndex=:i")
                .withValueMap(new ValueMap().withNumber(":i", currAddrInx));
        table.updateItem(updateItemSpec);
    } catch (Exception e) {
        System.out.println("Error in getting item.");
    }

    // Send them a redirect to the bitcoin uri if redirect is set
    if (request.getParameter("redirect") != null) {
        response.sendRedirect("bitcoin:" + address);
    } else {
        // Set response content type
        response.setContentType("text/html");

        // Actual logic goes here.
        PrintWriter out = response.getWriter();
        out.println("<a href=bitcoin:" + address + ">" + address + "</a>");

    }
}

From source file:com.achow101.bittipaddr.server.bittipaddrServiceImpl.java

License:Open Source License

public String addAddresses(AddrReq req) {

    // Setup the aws dynamo db client
    AmazonDynamoDBClient client = new AmazonDynamoDBClient();
    DynamoDB dynamoDB = new DynamoDB(client);
    Table table = dynamoDB.getTable("Bittipaddrs");

    // Check that the request is for editing an existing one
    if (!req.getId().equals("NEW")) {
        try {/*from w w  w  .ja v a2s  . c o  m*/
            Item item = table.getItem("ID", req.getId());

            // Check the password
            if (getHash(req.getPassword()).equals(item.getString("passhash"))) {
                // If the req has been edited, update DB
                if (req.isEdited()) {
                    // Recalculate addresses if xpub is set
                    if (!req.getXpub().equals("NONE")) {
                        try {
                            // Check Xpub
                            DeterministicKey xpub = DeterministicKey.deserializeB58(req.getXpub(), params);
                            DeterministicKey external = HDKeyDerivation.deriveChildKey(xpub, 0);

                            // Derive 1000 addresses and add to req
                            String[] addrs = new String[1000];
                            for (int i = 0; i < 1000; i++) {
                                addrs[i] = HDKeyDerivation.deriveChildKey(external, i).toAddress(params)
                                        .toBase58();
                            }
                            req.setAddresses(addrs);
                        } catch (Exception e) {
                            return "<p style=\"color:red;\">Invalid xpub" + req.getXpub() + "</p>";
                        }
                    }
                    if (req.getAddresses()[0].isEmpty())
                        return "<p style=\"color:red;\">Must have at least one address</p>";

                    UpdateItemSpec updateItemSpec = new UpdateItemSpec().withPrimaryKey("ID", req.getId())
                            .withUpdateExpression("set AddrIndex=:i, Addresses=:a, bip32xpub=:x")
                            .withValueMap(new ValueMap().withNumber(":i", 0)
                                    .withList(":a", Arrays.asList(req.getAddresses()))
                                    .withString(":x", req.getXpub()));
                    table.updateItem(updateItemSpec);
                    return req.getHtml();
                }

                String[] addresses = new String[item.getList("Addresses").size()];
                item.getList("Addresses").toArray(addresses);
                req.setAddresses(addresses);
                req.setXpub(item.getString("bip32xpub"));

                if (req.isEditable())
                    return req.getPlain();
                else
                    return req.getHtml();
            } else
                return "<p style=\"color:red;\">Incorrect password</p>";

        } catch (Exception e) {
            return "<p style=\"color:red;\">Could not find unit</p>";
        }

    }
    // Check validity of addresses
    else if (req.getXpub().equals("NONE") && req.getAddresses().length != 0) {
        for (int i = 0; i < req.getAddresses().length; i++) {
            try {
                Address addr = Address.fromBase58(params, req.getAddresses()[i]);
            } catch (AddressFormatException e) {
                return "<p style=\"color:red;\">Invalid address" + req.getAddresses()[i] + "</p>";
            }
        }
    }
    // Check validity of xpub
    else if (!req.getXpub().equals("NONE") && req.getAddresses().length == 0) {
        try {
            // Check Xpub
            DeterministicKey xpub = DeterministicKey.deserializeB58(req.getXpub(), params);
            DeterministicKey external = HDKeyDerivation.deriveChildKey(xpub, 0);

            // Derive 1000 addresses and add to req
            String[] addrs = new String[1000];
            for (int i = 0; i < 1000; i++) {
                addrs[i] = HDKeyDerivation.deriveChildKey(external, i).toAddress(params).toBase58();
            }
            req.setAddresses(addrs);
        } catch (Exception e) {
            return "<p style=\"color:red;\">Invalid xpub" + req.getXpub() + "</p>";
        }
    }

    // Set the request ID and unique password
    req.setId(new BigInteger(40, random).toString(32));
    req.setPassword(new BigInteger(256, random).toString(32));

    // Add request to DynamoDB
    Item item = null;
    try {
        item = new Item().withPrimaryKey("ID", req.getId()).withInt("AddrIndex", 0)
                .withList("Addresses", Arrays.asList(req.getAddresses())).withString("bip32xpub", req.getXpub())
                .withString("passhash", getHash(req.getPassword()));
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
    table.putItem(item);

    return req.getHtml();
}

From source file:com.eho.dynamodb.DynamoDBConnection.java

public static Item get_item_by_ID(String id) {
    DynamoDB dynamoDB = new DynamoDB(dynamoDBClient);
    Table table = dynamoDB.getTable(PATIENT_TABLE);
    Item retreived_item = table.getItem(PRIMARY_KEY, id);
    return retreived_item;
}

From source file:com.eho.dynamodb.DynamoDBConnection.java

public static PutItemOutcome upload_resource_old(String resource) throws Exception {
    String id;/*from w w  w. j a  va2 s  .  c om*/
    JSONObject json_resource = new JSONObject(resource);
    //does the resource have a primary key?
    if (json_resource.has(PRIMARY_KEY))//if it does not have a primary key, create one using uuid
        id = json_resource.getString(PRIMARY_KEY);
    else
        id = UUID.randomUUID().toString();

    DynamoDB dynamoDB = new DynamoDB(dynamoDBClient);
    Table table = dynamoDB.getTable(PATIENT_TABLE);

    //lets retreive based on the key. if key invalid (not assigned yet) nullis returned.
    Item retreived_item = table.getItem(PRIMARY_KEY, id);
    if (retreived_item == null)//if null instantiate it
    {
        retreived_item = new Item();
        retreived_item.withPrimaryKey(PRIMARY_KEY, id);
    }

    Integer new_version = retreived_item.getInt("version") + 1;
    retreived_item.withInt("version", new_version);

    Item item_to_upload = Item.fromJSON(retreived_item.toJSONPretty()).withJSON("Document", resource);
    PutItemSpec putItemSpec = new PutItemSpec().withItem(item_to_upload).withReturnValues(ReturnValue.NONE);
    return table.putItem(putItemSpec);
}

From source file:com.eho.dynamodb.DynamoDBConnection.java

public static String upload_resource(BaseResource resource,
        String primary_key /* if no primary key in case of post, send null*/ ) throws Exception {
    String id = add_primary_as_extension(resource, primary_key);
    String resource_string = DynamoDBConnection.fCtx.newJsonParser().setPrettyPrint(true)
            .encodeResourceToString(resource);
    ;//from  www  .ja v a  2  s  . c o  m
    DynamoDB dynamoDB = new DynamoDB(dynamoDBClient);
    Table table = dynamoDB.getTable(PATIENT_TABLE);

    //lets retreive based on the key. if key invalid (not assigned yet) nullis returned.
    Item retreived_item = table.getItem(PRIMARY_KEY, id);
    if (retreived_item == null)//if null instantiate it
    {
        retreived_item = new Item();
        retreived_item.withPrimaryKey(PRIMARY_KEY, id);
        retreived_item.withInt("version", -1);
    }

    Integer new_version = retreived_item.getInt("version") + 1;
    retreived_item.withInt("version", new_version);

    Item item_to_upload = retreived_item//Item.fromJSON(retreived_item.toJSONPretty())
            .withString("text" + new_version.toString(), resource_string)
            .withMap("json-document", new ObjectMapper().readValue(resource_string, LinkedHashMap.class));
    PutItemSpec putItemSpec = new PutItemSpec().withItem(item_to_upload);
    table.putItem(putItemSpec);
    return id;
}

From source file:com.eho.dynamodb.DynamoDBConnection.java

public static UpdateItemOutcome update_resource(String resource) throws Exception {
    String id;//  www . j a  v  a2s .co m
    JSONObject json_resource = new JSONObject(resource);
    //does the resource have a primary key?
    if (json_resource.has(PRIMARY_KEY))//if it does not have a primary key, create one using uuid
        id = json_resource.getString(PRIMARY_KEY);
    else
        id = UUID.randomUUID().toString();

    DynamoDB dynamoDB = new DynamoDB(dynamoDBClient);
    Table table = dynamoDB.getTable(PATIENT_TABLE);

    //lets retreive based on the key. if key invalid (not assigned yet) nullis returned.
    Item retreived_item = table.getItem(PRIMARY_KEY, id);
    if (retreived_item == null)//if null instantiate it
    {
        retreived_item = new Item();
        retreived_item.withPrimaryKey(PRIMARY_KEY, id);
    }

    Integer new_version = retreived_item.getInt("version") + 1;
    retreived_item.withInt("version", new_version);
    String new_version_str = new_version.toString();

    UpdateItemSpec updateItemSpec = new UpdateItemSpec().withPrimaryKey(PRIMARY_KEY, id)
            .withUpdateExpression("SET " + new_version_str + "= :newval")
            .withValueMap(new ValueMap().withString(":newval", resource)).withReturnValues(ReturnValue.ALL_NEW);

    return table.updateItem(updateItemSpec);
}

From source file:io.ignitr.dispatchr.manager.core.data.ClientRepository.java

License:Apache License

/**
 * Saves a new client in DynamoDB.//  w ww. j  a  v  a 2  s  . c om
 *
 * @param clientId client identifier
 * @param ownerName name of the person who owns the client
 * @param ownerEmail email of the person who owns the client
 * @return an {@link Observable} that emits the newly saved client
 */
public Observable<Client> save(String clientId, String ownerName, String ownerEmail) {
    return Observable.create(subscriber -> {
        Table clientTable = dynamoDB.getTable(CLIENT_TABLE_NAME);

        if (clientTable.getItem("clientId", clientId) != null) {
            throw new ClientAlreadyRegisteredException(clientId);
        }

        Client client = new Client();
        client.setClientId(clientId);
        client.setOwnerName(ownerName);
        client.setOwnerEmail(ownerEmail);

        clientTable.putItem(new Item().withPrimaryKey("clientId", client.getClientId())
                .withString("ownerName", client.getOwnerName())
                .withString("ownerEmail", client.getOwnerEmail()));

        subscriber.onNext(client);
        subscriber.onCompleted();
    });
}

From source file:io.ignitr.dispatchr.manager.core.data.ClientRepository.java

License:Apache License

/**
 * Finds a single client by id in DynamoDB.
 *
 * @param clientId client identifier/*www  .j  a v a 2s . c  om*/
 * @return an {@link Observable} that emits the client
 */
public Observable<Client> findOne(String clientId) {
    return Observable.create(subscriber -> {
        Table clientTable = dynamoDB.getTable(CLIENT_TABLE_NAME);

        Item item = clientTable.getItem("clientId", clientId);

        if (item == null) {
            throw new ClientNotFoundException(clientId);
        } else {
            subscriber.onNext(convertFromItem(item));
            subscriber.onCompleted();
        }
    });
}

From source file:io.ignitr.dispatchr.manager.core.data.ClientRepository.java

License:Apache License

/**
 * Checks whether or not a client with the supplied id exists in DynamoDB.
 *
 * @param clientId client identifier/*from  w w  w .  ja  va  2  s .c o m*/
 * @return an {@link Observable} that emits <code>true</code> if the delete was successful; otherwise <code>false</code>
 */
public Observable<Boolean> exists(String clientId) {
    return Observable.create(subscriber -> {
        Table clientTable = dynamoDB.getTable(CLIENT_TABLE_NAME);

        Item item = clientTable.getItem("clientId", clientId);

        if (item == null) {
            subscriber.onNext(false);
        } else {
            subscriber.onNext(true);
        }

        subscriber.onCompleted();
    });
}

From source file:io.ignitr.dispatchr.manager.core.data.TopicRepository.java

License:Apache License

/**
 * Finds the metadata for single topic./*w w w  . j a v a2 s.  c o  m*/
 *
 * @param topicName name of the topic
 * @return an {@link Observable} of {@link Topic} containing the metadata about the topic
 */
public Observable<Topic> findOne(String topicName) {
    return Observable.create(subscriber -> {
        Table table = dynamoDB.getTable(TOPIC_TABLE_NAME);

        Item item = table.getItem("name", topicName);

        if (item == null) {
            throw new TopicNotFoundException(topicName);
        } else {
            Topic metadata = new Topic();
            metadata.setName(item.getJSON("name"));
            metadata.setArn(item.getJSON("arn"));
            metadata.setRegistered(true);

            subscriber.onNext(metadata);
            subscriber.onCompleted();
        }
    });
}