steven-zhc/ostrich

A big and strong bird, but it could be running fast. A simple cassandra util using DAO and Template pattern

Ostrich

A big and strong bird, but it could be running faster.

A simple cassandra util using DAO and Template pattern.

Quickstart

 git clone [email protected]:um-dev/ostrich.git
 cd ostrich
 gradle clean build

The build requires a Java 8 JDK as JAVA_HOME, but will ensure Java 8 compatibility.

Example

String cql = "select * from employee where id = ? and dept = ?";

List<Event> list = template.queryForList(cql, new EmployeeRowMapper(), new Long(1), "IT");

Implement an EmployeeRowMapper

class EmployeeRowMapper implements RowMapper<Empolyee> {

    @Override
    public Event mapRow(Row row, int rowNum) {
        Employee e = new Employee();
        e.setId(row.getLong("id"));
        e.setName(row.getString("name"));
        e.setDepartment(row.getString("dept"));
        return e;
    }
}

Resources

Ostrich uses Gradle as its build tool. See the Gradle Primer section below if you are new to Gradle.

Gradle primer

This section describes some of the basics developers and contributors new to Gradle might need to know to get productive quickly. The Gradle documentation is very well done; 2 in particular that are indispensable:

• Gradle User Guide is a typical user guide in that it follows a topical approach to describing all of the capabilities of Gradle.
• Gradle DSL Guide is quite unique and excellent in quickyl getting up to speed on certain aspects of Gradle.

Using the Gradle Wrapper

For contributors who do not otherwise use Gradle and do not want to install it, Gradle offers a very cool features called the wrapper. It lets you run Gradle builds without a previously installed Gradle distro in a zero-conf manner. Ostrich configures the Gradle wrapper for you. If you would rather use the wrapper and not install Gradle (or to make sure you use the version of Gradle intended for older builds) you would just use the command gradlew (or gradlew.bat) rather than gradle (or gradle.bat) in the following discussions.
Note that gradlew is only available in the project's root dir, so depending on your pwd you may need to adjust the path to gradlew as well.

Executing Tasks

Gradle uses the concept of build tasks (equivalent to Ant targets or Maven phases/goals). You can get a list of available tasks via

gradle tasks

To execute a task across all modules, simply perform that task from the root directory. Gradle will visit each sub-project and execute that task if the sub-project defines it. To execute a task in a specific module you can either:

1. cd into that module directory and execute the task
2. name the "task path". For example, in order to run the tests for the sub module from the root directory you could say gradle sub-module:test