Oracle Cloud Infrastructure SDK for Java
oci-java-sdk provides an SDK for Java that you can use to manage your Oracle Cloud Infrastructure resources.
The project is open source and maintained by Oracle Corp. The home page for the project is here.
For basic set up, see Getting Started.
For details on compatibility, advanced configurations, and add-ons, see Configuration.
Examples can be found here.
You may run any example by invoking the
exec:java goal and passing appropriate values for
ObjectStorageGetBucketExample class requires 3 arguments which are OCID of the compartment, name of bucket, name of object. This example class can be executed as follows:
mvn -am -pl bmc-examples exec:java -Dexec.mainClass=ObjectStorageGetBucketExample \ -Dexec.arguments=compartment_ocid,bucket_name,object_name
object_name should be substituted with appropriate values according to your setup.
Full documentation, including prerequisites, installation, and configuration instructions, is available here.
API reference can be found here.
For details on contributions, questions, or feedback, see Contact Us.
oci-java-sdk is an open source project. See CONTRIBUTING for details.
Oracle gratefully acknowledges the contributions to oci-java-sdk that have been made by the community.
Potential data corruption issue with OCI Java SDK on binary data upload with
Details: When using version 1.25.1 or earlier of the OCI Java SDK clients that upload streams of data (for example
FunctionsInvokeClient), either synchronously and asynchronously, and you use a
RefreshableOnNotAuthenticatedProvider (for example, for Resource Principals or Instance Principals) you may be affected by silent data corruption.
Workaround: Update the OCI Java SDK client to version 1.25.2 or later. For more information about this issue and workarounds, see Potential data corruption issue for OCI Java SDK on binary data upload with
Program hangs for an indefinite time
If the request to the server hangs for an indefinite time and the program gets stuck, it could be
because the connection is not released from the Apache connection
pool. If you're calling APIs that return a binary/stream response,
please make sure to close all the streams returned from the response to release the connections from the connection pool in case of partial reads. If reading the stream completely, the SDK will
automatically try to close the stream to release the connection from the connection pool, to disable this feature of auto-closing streams on full read, please call
ResponseHelper.shouldAutoCloseResponseInputStream(false). This is because the SDK for Java supports the Apache Connector for sending requests and managing connections to the service. By default, the Apache Connector supports connection pooling and in the cases where the stream from the response is not closed, the connections don't get released from the connection pool and in turn results in an indefinite wait time. This can be avoided either by closing the streams or switching back to the Jersey default connector, i.e.
HttpUrlConnector. You can find more information about the same in the OCI Java SDK Troubleshooting section.
Performance issues and switching between connection closing strategies with the Apache Connector
The Java SDK supports the Apache Connector as the default. The Apache Connector supports the use of two connection closing strategies -
ApacheConnectionClosingStrategy.GracefulClosingStrategy, streams returned from response are read till the end of the stream when closing the stream. This can introduce additional time when closing the stream with partial read, depending on how large the remaining stream is.
ApacheConnectionClosingStrategy.ImmediateClosingStrategy for large files with partial reads instead for faster close. One of the disadvantages of using
ApacheConnectionClosingStrategy.ImmediateClosingStrategy on the other hand takes longer when using partial read for smaller stream size (< 1MB). Please consider your use-case and change accordingly. For more info please look into : https://github.com/oracle/oci-java-sdk/blob/master/ApacheConnector-README.md.
Note : If both the above Apache Connection closing strategies do not give you optimal results for your use-cases, please consider switching back to Jersey Default
For more info on Apache Connector, please look into ApacheConnector-README.
You can find information on any known issues with the SDK here and under the “Issues” tab of this GitHub repository.
Copyright (c) 2016, 2020, Oracle and/or its affiliates. All rights reserved. This software is dual-licensed to you under the Universal Permissive License (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl or Apache License 2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose either license.
See LICENSE for more details.