package org.archive.accesscontrol;
import java.io.IOException;
import java.util.Collection;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.MultiThreadedHttpConnectionManager;
import org.apache.commons.httpclient.methods.GetMethod;
import org.archive.accesscontrol.model.Rule;
import org.archive.accesscontrol.model.RuleSet;
import com.thoughtworks.xstream.XStream;
/**
* The HTTP Rule Data Access Object enables a rule database to be queried via
* the REST interface�an oracle.
*
* For details of the protocol, see:
* http://webteam.archive.org/confluence/display/wayback/Exclusions+API
*
* @author aosborne
*
*/
public class HttpRuleDao implements RuleDao {
protected HttpClient http = new HttpClient(
new MultiThreadedHttpConnectionManager());
protected XStream xstream = new XStream();
private String oracleUrl;
public HttpRuleDao(String oracleUrl) {
this.oracleUrl = oracleUrl;
xstream.alias("rule", Rule.class);
xstream.alias("ruleSet", RuleSet.class);
}
/**
* @throws RuleOracleUnavailableException
* @see RuleDao#getRuleTree(String)
*/
public RuleSet getRuleTree(String surt) throws RuleOracleUnavailableException {
HttpMethod method = new GetMethod(oracleUrl + "/rules/tree/" + surt);
RuleSet rules;
try {
http.executeMethod(method);
String response = method.getResponseBodyAsString();
System.out.println(response);
rules = (RuleSet) xstream.fromXML(method.getResponseBodyAsStream());
} catch (IOException e) {
throw new RuleOracleUnavailableException(e);
}
method.releaseConnection();
return rules;
}
/**
* @return the oracleUrl
*/
public String getOracleUrl() {
return oracleUrl;
}
/**
* @param oracleUrl
* the oracleUrl to set
*/
public void setOracleUrl(String oracleUrl) {
this.oracleUrl = oracleUrl;
}
public void prepare(Collection<String> surts) {
// no-op
}
}