迁移应用程序以使用 Azure Cosmos DB Java SDK v4

        // Create Async client.
        // Building an async client is still a sync operation.
        CosmosAsyncClient client = new CosmosClientBuilder()
                .endpoint("your.hostname")
                .key("yourmasterkey")
                .consistencyLevel(ConsistencyLevel.EVENTUAL)
                .buildAsyncClient();

        // Create database with specified name
        client.createDatabaseIfNotExists("YourDatabaseName")
                .flatMap(databaseResponse -> {
                    testDatabaseAsync = client.getDatabase("YourDatabaseName");
                    // Container properties - name and partition key
                    CosmosContainerProperties containerProperties =
                            new CosmosContainerProperties("YourContainerName", "/id");

                    // Provision manual throughput
                    ThroughputProperties throughputProperties = ThroughputProperties.createManualThroughput(400);

                    // Create container
                    return database.createContainerIfNotExists(containerProperties, throughputProperties);
                }).flatMap(containerResponse -> {
            testContainerAsync = database.getContainer("YourContainerName");
            return Mono.empty();
        }).subscribe();

ConnectionPolicy defaultPolicy = ConnectionPolicy.defaultPolicy();
//  Setting the preferred location to Azure Cosmos DB Account region
defaultPolicy.preferredLocations(Lists.newArrayList("Your Account Location"));

//  Create async client
//  <CreateAsyncClient>
client = new CosmosClientBuilder()
        .endpoint("your.hostname")
        .key("yourmasterkey")
        .connectionPolicy(defaultPolicy)
        .consistencyLevel(ConsistencyLevel.EVENTUAL)
        .build();

// Create database with specified name
client.createDatabaseIfNotExists("YourDatabaseName")
      .flatMap(databaseResponse -> {
        database = databaseResponse.database();
        // Container properties - name and partition key
        CosmosContainerProperties containerProperties = 
            new CosmosContainerProperties("YourContainerName", "/id");
        // Create container with specified properties & provisioned throughput
        return database.createContainerIfNotExists(containerProperties, 400);
    }).flatMap(containerResponse -> {
        container = containerResponse.container();
        return Mono.empty();
}).subscribe();

ConnectionPolicy defaultPolicy = ConnectionPolicy.GetDefault();
//  Setting the preferred location to Azure Cosmos DB Account region
defaultPolicy.setPreferredLocations(Lists.newArrayList("Your Account Location"));

//  Create document client
//  <CreateDocumentClient>
client = new DocumentClient("your.hostname", "your.masterkey", defaultPolicy, ConsistencyLevel.Eventual)

// Create database with specified name
Database databaseDefinition = new Database();
databaseDefinition.setId("YourDatabaseName");
ResourceResponse<Database> databaseResourceResponse = client.createDatabase(databaseDefinition, new RequestOptions());

// Read database with specified name
String databaseLink = "dbs/YourDatabaseName";
databaseResourceResponse = client.readDatabase(databaseLink, new RequestOptions());
Database database = databaseResourceResponse.getResource();

// Create container with specified name
DocumentCollection documentCollection = new DocumentCollection();
documentCollection.setId("YourContainerName");
documentCollection = client.createCollection(database.getSelfLink(), documentCollection, new RequestOptions()).getResource();

// Create Async client.
// Building an async client is still a sync operation.
AsyncDocumentClient client = new Builder()
    .withServiceEndpoint("your.hostname")
    .withMasterKeyOrResourceToken("yourmasterkey")
    .withConsistencyLevel(ConsistencyLevel.Eventual)
    .build();
// Create database with specified name
Database database = new Database();
database.setId("YourDatabaseName");
client.createDatabase(database, new RequestOptions())
      .flatMap(databaseResponse -> {
          // Collection properties - name and partition key
          DocumentCollection documentCollection = new DocumentCollection();
          documentCollection.setId("YourContainerName");
          documentCollection.setPartitionKey(new PartitionKeyDefinition("/id"));
          // Create collection
          return client.createCollection(databaseResponse.getResource().getSelfLink(), documentCollection, new RequestOptions());
}).subscribe();

// Container is created. Generate many docs to insert.
int number_of_docs = 50000;
ArrayList<JsonNode> docs = generateManyDocs(number_of_docs);

// Insert many docs into container...
Flux.fromIterable(docs)
        .flatMap(doc -> testContainerAsync.createItem(doc))
        .subscribe(); // ...Subscribing triggers stream execution.

// Container is created. Generate many docs to insert.
int number_of_docs = 50000;
ArrayList<JsonNode> docs = generateManyDocs(number_of_docs);

// Insert many docs into container...
Flux.fromIterable(docs)
    .flatMap(doc -> container.createItem(doc))
    .subscribe(); // ...Subscribing triggers stream execution.

//  Container is created. Generate documents to insert.
Document document = new Document();
document.setId("YourDocumentId");
ResourceResponse<Document> documentResourceResponse = client.createDocument(documentCollection.getSelfLink(), document,
    new RequestOptions(), true);
Document responseDocument = documentResourceResponse.getResource();

// Collection is created. Generate many docs to insert.
int number_of_docs = 50000;
ArrayList<Document> docs = generateManyDocs(number_of_docs);
// Insert many docs into collection...
Observable.from(docs)
    .flatMap(doc -> client.createDocument(createdCollection.getSelfLink(), doc, new RequestOptions(), false))
    .subscribe(); // ...Subscribing triggers stream execution.

CosmosContainerProperties containerProperties = new CosmosContainerProperties(containerName, "/lastName");

// Custom indexing policy
IndexingPolicy indexingPolicy = new IndexingPolicy();
indexingPolicy.setIndexingMode(IndexingMode.CONSISTENT);

// Included paths
List<IncludedPath> includedPaths = new ArrayList<>();
includedPaths.add(new IncludedPath("/*"));
indexingPolicy.setIncludedPaths(includedPaths);

// Excluded paths
List<ExcludedPath> excludedPaths = new ArrayList<>();
excludedPaths.add(new ExcludedPath("/name/*"));
indexingPolicy.setExcludedPaths(excludedPaths);

containerProperties.setIndexingPolicy(indexingPolicy);

ThroughputProperties throughputProperties = ThroughputProperties.createManualThroughput(400);

database.createContainerIfNotExists(containerProperties, throughputProperties);
CosmosAsyncContainer containerIfNotExists = database.getContainer(containerName);

CosmosContainerProperties containerProperties = new CosmosContainerProperties(containerName, "/lastName");

// Custom indexing policy
IndexingPolicy indexingPolicy = new IndexingPolicy();
indexingPolicy.setIndexingMode(IndexingMode.CONSISTENT); //To turn indexing off set IndexingMode.NONE

// Included paths
List<IncludedPath> includedPaths = new ArrayList<>();
IncludedPath includedPath = new IncludedPath();
includedPath.path("/*");
includedPaths.add(includedPath);
indexingPolicy.includedPaths(includedPaths);

// Excluded paths
List<ExcludedPath> excludedPaths = new ArrayList<>();
ExcludedPath excludedPath = new ExcludedPath();
excludedPath.path("/name/*");
excludedPaths.add(excludedPath);
indexingPolicy.excludedPaths(excludedPaths);

containerProperties.indexingPolicy(indexingPolicy);

CosmosContainer containerIfNotExists = database.createContainerIfNotExists(containerProperties, 400)
                                               .block()
                                               .container();

// Custom indexing policy
IndexingPolicy indexingPolicy = new IndexingPolicy();
indexingPolicy.setIndexingMode(IndexingMode.Consistent); //To turn indexing off set IndexingMode.NONE

// Included paths
List<IncludedPath> includedPaths = new ArrayList<>();
IncludedPath includedPath = new IncludedPath();
includedPath.setPath("/*");
includedPaths.add(includedPath);
indexingPolicy.setIncludedPaths(includedPaths);

// Excluded paths
List<ExcludedPath> excludedPaths = new ArrayList<>();
ExcludedPath excludedPath = new ExcludedPath();
excludedPath.setPath("/name/*");
excludedPaths.add(excludedPath);
indexingPolicy.setExcludedPaths(excludedPaths);

// Create container with specified name and indexing policy
DocumentCollection documentCollection = new DocumentCollection();
documentCollection.setId("YourContainerName");
documentCollection.setIndexingPolicy(indexingPolicy);
documentCollection = client.createCollection(database.getSelfLink(), documentCollection, new RequestOptions()).getResource();

// Custom indexing policy
IndexingPolicy indexingPolicy = new IndexingPolicy();
indexingPolicy.setIndexingMode(IndexingMode.Consistent); //To turn indexing off set IndexingMode.None
// Included paths
List<IncludedPath> includedPaths = new ArrayList<>();
IncludedPath includedPath = new IncludedPath();
includedPath.setPath("/*");
includedPaths.add(includedPath);
indexingPolicy.setIncludedPaths(includedPaths);
// Excluded paths
List<ExcludedPath> excludedPaths = new ArrayList<>();
ExcludedPath excludedPath = new ExcludedPath();
excludedPath.setPath("/name/*");
excludedPaths.add(excludedPath);
indexingPolicy.setExcludedPaths(excludedPaths);
// Create container with specified name and indexing policy
DocumentCollection documentCollection = new DocumentCollection();
documentCollection.setId("YourContainerName");
documentCollection.setIndexingPolicy(indexingPolicy);
client.createCollection(database.getSelfLink(), documentCollection, new RequestOptions()).subscribe();

logger.info("Creating stored procedure...\n");

String sprocId = "createMyDocument";

String sprocBody = "function createMyDocument() {\n" +
        "var documentToCreate = {\"id\":\"test_doc\"}\n" +
        "var context = getContext();\n" +
        "var collection = context.getCollection();\n" +
        "var accepted = collection.createDocument(collection.getSelfLink(), documentToCreate,\n" +
        "    function (err, documentCreated) {\n" +
        "if (err) throw new Error('Error' + err.message);\n" +
        "context.getResponse().setBody(documentCreated.id)\n" +
        "});\n" +
        "if (!accepted) return;\n" +
        "}";

CosmosStoredProcedureProperties storedProcedureDef = new CosmosStoredProcedureProperties(sprocId, sprocBody);
container.getScripts()
        .createStoredProcedure(storedProcedureDef,
                new CosmosStoredProcedureRequestOptions()).block();

// ...

logger.info(String.format("Executing stored procedure %s...\n\n", sprocId));

CosmosStoredProcedureRequestOptions options = new CosmosStoredProcedureRequestOptions();
options.setPartitionKey(new PartitionKey("test_doc"));

container.getScripts()
        .getStoredProcedure(sprocId)
        .execute(null, options)
        .flatMap(executeResponse -> {
            logger.info(String.format("Stored procedure %s returned %s (HTTP %d), at cost %.3f RU.\n",
                    sprocId,
                    executeResponse.getResponseAsString(),
                    executeResponse.getStatusCode(),
                    executeResponse.getRequestCharge()));
            return Mono.empty();
        }).block();

logger.info("Creating stored procedure...\n");

sprocId = "createMyDocument";
String sprocBody = "function createMyDocument() {\n" +
        "var documentToCreate = {\"id\":\"test_doc\"}\n" +
        "var context = getContext();\n" +
        "var collection = context.getCollection();\n" +
        "var accepted = collection.createDocument(collection.getSelfLink(), documentToCreate,\n" +
        "    function (err, documentCreated) {\n" +
        "if (err) throw new Error('Error' + err.message);\n" +
        "context.getResponse().setBody(documentCreated.id)\n" +
        "});\n" +
        "if (!accepted) return;\n" +
        "}";
CosmosStoredProcedureProperties storedProcedureDef = new CosmosStoredProcedureProperties(sprocId, sprocBody);
container.getScripts()
        .createStoredProcedure(storedProcedureDef,
                new CosmosStoredProcedureRequestOptions()).block();

// ...

logger.info(String.format("Executing stored procedure %s...\n\n", sprocId));

CosmosStoredProcedureRequestOptions options = new CosmosStoredProcedureRequestOptions();
options.partitionKey(new PartitionKey("test_doc"));

container.getScripts()
        .getStoredProcedure(sprocId)
        .execute(null, options)
        .flatMap(executeResponse -> {
            logger.info(String.format("Stored procedure %s returned %s (HTTP %d), at cost %.3f RU.\n",
                    sprocId,
                    executeResponse.responseAsString(),
                    executeResponse.statusCode(),
                    executeResponse.requestCharge()));
            return Mono.empty();
        }).block();

logger.info("Creating stored procedure...\n");

String sprocId = "createMyDocument";
String sprocBody = "function createMyDocument() {\n" +
    "var documentToCreate = {\"id\":\"test_doc\"}\n" +
    "var context = getContext();\n" +
    "var collection = context.getCollection();\n" +
    "var accepted = collection.createDocument(collection.getSelfLink(), documentToCreate,\n" +
    "    function (err, documentCreated) {\n" +
    "if (err) throw new Error('Error' + err.message);\n" +
    "context.getResponse().setBody(documentCreated.id)\n" +
    "});\n" +
    "if (!accepted) return;\n" +
    "}";
StoredProcedure storedProcedureDef = new StoredProcedure();
storedProcedureDef.setId(sprocId);
storedProcedureDef.setBody(sprocBody);
StoredProcedure storedProcedure = client.createStoredProcedure(documentCollection.getSelfLink(), storedProcedureDef, new RequestOptions())
                                        .getResource();

// ...

logger.info(String.format("Executing stored procedure %s...\n\n", sprocId));

RequestOptions options = new RequestOptions();
options.setPartitionKey(new PartitionKey("test_doc"));

StoredProcedureResponse storedProcedureResponse =
    client.executeStoredProcedure(storedProcedure.getSelfLink(), options, null);
logger.info(String.format("Stored procedure %s returned %s (HTTP %d), at cost %.3f RU.\n",
    sprocId,
    storedProcedureResponse.getResponseAsString(),
    storedProcedureResponse.getStatusCode(),
    storedProcedureResponse.getRequestCharge()));

logger.info("Creating stored procedure...\n");
String sprocId = "createMyDocument";
String sprocBody = "function createMyDocument() {\n" +
    "var documentToCreate = {\"id\":\"test_doc\"}\n" +
    "var context = getContext();\n" +
    "var collection = context.getCollection();\n" +
    "var accepted = collection.createDocument(collection.getSelfLink(), documentToCreate,\n" +
    "    function (err, documentCreated) {\n" +
    "if (err) throw new Error('Error' + err.message);\n" +
    "context.getResponse().setBody(documentCreated.id)\n" +
    "});\n" +
    "if (!accepted) return;\n" +
    "}";
StoredProcedure storedProcedureDef = new StoredProcedure();
storedProcedureDef.setId(sprocId);
storedProcedureDef.setBody(sprocBody);
StoredProcedure storedProcedure = client
    .createStoredProcedure(documentCollection.getSelfLink(), storedProcedureDef, new RequestOptions())
    .toBlocking()
    .single()
    .getResource();
// ...
logger.info(String.format("Executing stored procedure %s...\n\n", sprocId));
RequestOptions options = new RequestOptions();
options.setPartitionKey(new PartitionKey("test_doc"));
StoredProcedureResponse storedProcedureResponse =
    client.executeStoredProcedure(storedProcedure.getSelfLink(), options, null)
    .toBlocking().single();
logger.info(String.format("Stored procedure %s returned %s (HTTP %d), at cost %.3f RU.\n",
    sprocId,
    storedProcedureResponse.getResponseAsString(),
    storedProcedureResponse.getStatusCode(),
    storedProcedureResponse.getRequestCharge()));

ChangeFeedProcessor changeFeedProcessorInstance =
        new ChangeFeedProcessorBuilder()
                .hostName(hostName)
                .feedContainer(feedContainer)
                .leaseContainer(leaseContainer)
                .handleChanges((List<JsonNode> docs) -> {
                    logger.info("--->setHandleChanges() START");

                    for (JsonNode document : docs) {
                        try {
                            //Change Feed hands the document to you in the form of a JsonNode
                            //As a developer you have two options for handling the JsonNode document provided to you by Change Feed
                            //One option is to operate on the document in the form of a JsonNode, as shown below. This is great
                            //especially if you do not have a single uniform data model for all documents.
                            logger.info("---->DOCUMENT RECEIVED: " + OBJECT_MAPPER.writerWithDefaultPrettyPrinter()
                                    .writeValueAsString(document));

                            //You can also transform the JsonNode to a POJO having the same structure as the JsonNode,
                            //as shown below. Then you can operate on the POJO.
                            CustomPOJO pojo_doc = OBJECT_MAPPER.treeToValue(document, CustomPOJO.class);
                            logger.info("----=>id: " + pojo_doc.getId());

                        } catch (JsonProcessingException e) {
                            e.printStackTrace();
                        }
                    }
                    logger.info("--->handleChanges() END");

                })
                .buildChangeFeedProcessor();

// ...

changeFeedProcessorInstance.start()
        .subscribeOn(Schedulers.elastic())
        .subscribe();

ChangeFeedProcessor changeFeedProcessorInstance = 
ChangeFeedProcessor.Builder()
        .hostName(hostName)
        .feedContainer(feedContainer)
        .leaseContainer(leaseContainer)
        .handleChanges((List<CosmosItemProperties> docs) -> {
            logger.info("--->setHandleChanges() START");

            for (CosmosItemProperties document : docs) {
                try {

                    // You are given the document as a CosmosItemProperties instance which you may
                    // cast to the desired type.
                    CustomPOJO pojo_doc = document.getObject(CustomPOJO.class);
                    logger.info("----=>id: " + pojo_doc.id());

                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            logger.info("--->handleChanges() END");

        })
        .build();

// ...

 changeFeedProcessorInstance.start()
                            .subscribeOn(Schedulers.elastic())
                            .subscribe();

• 从 Java SDK v2 同步开始不支持此功能。

• 从 Java SDK v2 异步开始，不再支持此功能。

CosmosAsyncContainer container;

// Create a new container with TTL enabled with default expiration value
CosmosContainerProperties containerProperties = new CosmosContainerProperties("myContainer", "/myPartitionKey");
containerProperties.setDefaultTimeToLiveInSeconds(90 * 60 * 60 * 24);
ThroughputProperties throughputProperties = ThroughputProperties.createManualThroughput(400);
database.createContainerIfNotExists(containerProperties, throughputProperties).block();
container = database.getContainer("myContainer");

CosmosContainer container;

// Create a new container with TTL enabled with default expiration value
CosmosContainerProperties containerProperties = new CosmosContainerProperties("myContainer", "/myPartitionKey");
containerProperties.defaultTimeToLive(90 * 60 * 60 * 24);
container = database.createContainerIfNotExists(containerProperties, 400).block().container();

DocumentCollection documentCollection;

// Create a new container with TTL enabled with default expiration value
documentCollection.setDefaultTimeToLive(90 * 60 * 60 * 24);
documentCollection = client.createCollection(database.getSelfLink(), documentCollection, new RequestOptions()).getResource();

DocumentCollection collection = new DocumentCollection();
// Create a new container with TTL enabled with default expiration value
collection.setDefaultTimeToLive(90 * 60 * 60 * 24);
collection = client
    .createCollection(database.getSelfLink(), documentCollection, new RequestOptions())
    .toBlocking()
    .single()
    .getResource();

// Include a property that serializes to "ttl" in JSON
class SalesOrder
{
    private String id;
    private String customerId;
    private Integer ttl;

    public SalesOrder(String id, String customerId, Integer ttl) {
        this.id = id;
        this.customerId = customerId;
        this.ttl = ttl;
    }

    public String getId() {return this.id;}
    public void setId(String new_id) {this.id = new_id;}
    public String getCustomerId() {return this.customerId;}
    public void setCustomerId(String new_cid) {this.customerId = new_cid;}
    public Integer getTtl() {return this.ttl;}
    public void setTtl(Integer new_ttl) {this.ttl = new_ttl;}

    //...
}

// Set the value to the expiration in seconds
SalesOrder salesOrder = new SalesOrder(
        "SO05",
        "CO18009186470",
        60 * 60 * 24 * 30  // Expire sales orders in 30 days
);

// Include a property that serializes to "ttl" in JSON
public class SalesOrder
{
    private String id;
    private String customerId;
    private Integer ttl;

    public SalesOrder(String id, String customerId, Integer ttl) {
        this.id = id;
        this.customerId = customerId;
        this.ttl = ttl;
    }

    public String id() {return this.id;}
    public SalesOrder id(String new_id) {this.id = new_id; return this;}
    public String customerId() {return this.customerId; return this;}
    public SalesOrder customerId(String new_cid) {this.customerId = new_cid;}
    public Integer ttl() {return this.ttl;}
    public SalesOrder ttl(Integer new_ttl) {this.ttl = new_ttl; return this;}

    //...
}

// Set the value to the expiration in seconds
SalesOrder salesOrder = new SalesOrder(
    "SO05",
    "CO18009186470",
    60 * 60 * 24 * 30  // Expire sales orders in 30 days
);

Document document = new Document();
document.setId("YourDocumentId");
document.setTimeToLive(60 * 60 * 24 * 30 ); // Expire document in 30 days
ResourceResponse<Document> documentResourceResponse = client.createDocument(documentCollection.getSelfLink(), document,
    new RequestOptions(), true);
Document responseDocument = documentResourceResponse.getResource();

Document document = new Document();
document.setId("YourDocumentId");
document.setTimeToLive(60 * 60 * 24 * 30 ); // Expire document in 30 days
ResourceResponse<Document> documentResourceResponse = client.createDocument(documentCollection.getSelfLink(), document,
    new RequestOptions(), true).toBlocking().single();
Document responseDocument = documentResourceResponse.getResource();