datameer.awstasks.ant.ec2.AbstractEc2Task.java Source code

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Here is the source code for datameer.awstasks.ant.ec2.AbstractEc2Task.java

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/**
 * Copyright 2010 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package datameer.awstasks.ant.ec2;

import org.apache.log4j.NDC;
import org.apache.tools.ant.BuildException;

import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.ec2.AmazonEC2;
import com.amazonaws.services.ec2.AmazonEC2Client;

import datameer.awstasks.ant.AbstractAwsTask;

public abstract class AbstractEc2Task extends AbstractAwsTask {

    protected String _groupName;

    public void setGroupName(String name) {
        _groupName = name;
    }

    public String getName() {
        return _groupName;
    }

    private AmazonEC2 createEc2() {
        return new AmazonEC2Client(new BasicAWSCredentials(_accessKey, _accessSecret));
    }

    @Override
    public final void execute() throws BuildException {
        if (NDC.getDepth() <= 0) {
            NDC.push(_groupName);
        }
        validate();
        doExecute(createEc2());
    }

    protected abstract void doExecute(AmazonEC2 ec2);

    protected void validate() {
        // subclasses may override
    }

}