Add spring sharding demo

java/jdbc/SpringSharding/JDBCTemplate/.gitignore

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+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/

java/jdbc/SpringSharding/JDBCTemplate/LICENSE.txt

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+Copyright (c) 2023 Oracle and/or its affiliates.
+
+The Universal Permissive License (UPL), Version 1.0
+
+Subject to the condition set forth below, permission is hereby granted to any
+person obtaining a copy of this software, associated documentation and/or data
+(collectively the "Software"), free of charge and under any and all copyright
+rights in the Software, and any and all patent rights owned or freely
+licensable by each licensor hereunder covering either (i) the unmodified
+Software as contributed to or provided by such licensor, or (ii) the Larger
+Works (as defined below), to deal in both
+
+(a) the Software, and
+(b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
+one is included with the Software (each a "Larger Work" to which the Software
+is contributed by such licensors),
+
+without restriction, including without limitation the rights to copy, create
+derivative works of, display, perform, and distribute the Software and make,
+use, sell, offer for sale, import, export, have made, and have sold the
+Software and the Larger Work(s), and to sublicense the foregoing rights on
+either these or other terms.
+
+This license is subject to the following condition:
+The above copyright notice and either this complete permission notice or at
+a minimum a reference to the UPL must be included in all copies or
+substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

java/jdbc/SpringSharding/JDBCTemplate/README.md

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+## Overview
+
+This project demonstrates the use of the latest sharding [feature](https://github.com/spring-projects/spring-framework/pull/31506) in Spring Framework with the Oracle Database.
+The feature is about supporting direct routing to sharded databases.
+
+This version uses Spring Data JDBC (JdbcTemplate), for data access.
+
+You can use the datasource configurations provided in this project as a template for setting up the sharding feature in your own projects.
+
+## Configuration
+
+### Database
+
+You can refer to the [Oracle Docs](https://docs.oracle.com/en/database/oracle/oracle-database/21/shard/sharding-deployment.html#GUID-F99B8742-4089-4E77-87D4-4691EA932207)
+to learn how to set up and deploy an Oracle sharded database.
+You can also refer to [Oracle Database Operator](https://github.com/oracle/oracle-database-operator) that makes deploying a sharded database on a Kubernetes Cluster an easy process.
+
+After your sharded database is set, run the following SQL script on the shard catalog to create your tables.
+
+~~~SQL
+ALTER SESSION ENABLE SHARD DDL;
+
+CREATE TABLESPACE SET TS1 USING TEMPLATE (
+    DATAFILE SIZE 100M AUTOEXTEND ON NEXT 10M MAXSIZE UNLIMITED
+    EXTENT MANAGEMENT LOCAL SEGMENT SPACE MANAGEMENT AUTO);
+
+CREATE SHARDED TABLE users (
+    user_id  NUMBER PRIMARY KEY,
+    name     VARCHAR2(100),
+    password VARCHAR2(255),
+    role     VARCHAR2(5),
+CONSTRAINT roleCheck CHECK (role IN ('USER', 'ADMIN')))
+TABLESPACE SET TS1 PARTITION BY CONSISTENT HASH (user_id);
+
+CREATE SHARDED TABLE notes (
+    note_id NUMBER NOT NULL,
+    user_id NUMBER NOT NULL,
+    title   VARCHAR2(255),
+    content CLOB,
+CONSTRAINT notePK PRIMARY KEY (note_id, user_id),
+CONSTRAINT userFK FOREIGN KEY (user_id) REFERENCES users(user_id))
+PARTITION BY REFERENCE (UserFK);
+
+CREATE SEQUENCE note_sequence INCREMENT BY 1 START WITH 1 MAXVALUE 2E9 SHARD;
+~~~
+
+Make sure to insert a user or two in the database before testing the application.
+
+~~~SQL
+INSERT INTO users VALUES (0, 'user1', standard_hash('user1', 'SHA256'), 'USER');
+INSERT INTO users VALUES (1, 'admin', standard_hash('admin', 'SHA256'), 'ADMIN');
+~~~
+
+## Building the application
+To build the application run:
+
+~~~
+mvn install
+~~~
+
+## Running the application
+
+Before running the application set the following environment variables or update [application.properties](src/main/resources/application.properties). These configure the URL and credentials for the catalog database and shard director (GSM) used by the application.
+
+~~~shell
+export CATALOG_URL="the catalog url"
+export CATALOG_USER="username"
+export CATALOG_PASS="password"
+export SHARD_DIRECTOR_URL="the shard director url"
+export SHARD_DIRECTOR_USER="username"
+export SHARD_DIRECTOR_PASS="password"
+~~~
+
+Then you can run the application using:
+
+~~~shell
+mvn spring-boot:run
+~~~