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/*
* The MIT License
*
* Copyright 2010 Sony Ericsson Mobile Communications. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall 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.
*/
package com.sonyericsson.hudson.plugins.gerrit.gerritevents;
import com.sonyericsson.hudson.plugins.gerrit.gerritevents.ssh.Authentication;
import com.sonyericsson.hudson.plugins.gerrit.gerritevents.ssh.SshConnection;
import com.sonyericsson.hudson.plugins.gerrit.gerritevents.ssh.SshConnectionFactory;
import com.sonyericsson.hudson.plugins.gerrit.gerritevents.ssh.SshException;
import java.io.BufferedReader;
import java.io.IOException;
import java.util.LinkedList;
import java.util.List;
import net.sf.json.JSONObject;
import net.sf.json.JSONSerializer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This class helps you call gerrit query to search for patch-sets.
* @author Robert Sandell <[email protected]>
*/
public class GerritQueryHandler {
private static final Logger logger = LoggerFactory.getLogger(GerritQueryHandler.class);
/**
* The base of the query ssh command to send to Gerrit.
*/
public static final String QUERY_COMMAND = "gerrit query";
private final String gerritHostName;
private final int gerritSshPort;
private final Authentication authentication;
/**
* Creates a GerritQueryHandler with the specified values.
* @param gerritHostName the hostName
* @param gerritSshPort the ssh port that the gerrit server listens to.
* @param authentication the authentication credentials.
*/
public GerritQueryHandler(String gerritHostName,
int gerritSshPort,
Authentication authentication) {
this.gerritHostName = gerritHostName;
this.gerritSshPort = gerritSshPort;
this.authentication = authentication;
}
/**
* Creates a GerritQueryHandler with the specified config.
* @param config the config.
*/
public GerritQueryHandler(GerritConnectionConfig config) {
this(config.getGerritHostName(),
config.getGerritSshPort(),
config.getGerritAuthentication());
}
//CS IGNORE RedundantThrows FOR NEXT 18 LINES. REASON: Informative.
//CS IGNORE JavadocMethod FOR NEXT 17 LINES. REASON: It is there.
/**
* Runs the query and returns the result as a list of Java JSONObjects.
* It is the equivalent of calling queryJava(queryString, true, true).
* @param queryString the query.
* @return the query result as a List of JSONObjects.
* @throws GerritQueryException if Gerrit reports an error with the query.
* @throws SshException if there is an error in the SSH Connection.
* @throws IOException for some other IO problem.
*/
public List queryJava(String queryString) throws SshException, IOException, GerritQueryException {
return queryJava(queryString, true, true, false);
}
//CS IGNORE RedundantThrows FOR NEXT 18 LINES. REASON: Informative.
//CS IGNORE JavadocMethod FOR NEXT 17 LINES. REASON: It is there.
/**
* Runs the query and returns the result as a list of Java JSONObjects.
* @param queryString the query.
* @param getPatchSets getPatchSets if all patch-sets of the projects found should be included in the result.
* Meaning if --patch-sets should be appended to the command call.
* @param getCurrentPatchSet if the current patch-set for the projects found should be included in the result.
* Meaning if --current-patch-set should be appended to the command call.
* @return the query result as a List of JSONObjects.
* @throws GerritQueryException if Gerrit reports an error with the query.
* @throws SshException if there is an error in the SSH Connection.
* @throws IOException for some other IO problem.
*/
public List queryJava(String queryString, boolean getPatchSets, boolean getCurrentPatchSet,
boolean getFiles) throws SshException, IOException, GerritQueryException {
final List list = new LinkedList();
runQuery(queryString, getPatchSets, getCurrentPatchSet, getFiles, new LineVisitor() {
@Override
public void visit(String line) throws GerritQueryException {
JSONObject json = (JSONObject)JSONSerializer.toJSON(line.trim());
if (json.has("type") && "error".equalsIgnoreCase(json.getString("type"))) {
throw new GerritQueryException(json.getString("message"));
}
list.add(json);
}
});
return list;
}
//CS IGNORE RedundantThrows FOR NEXT 18 LINES. REASON: Informative.
//CS IGNORE JavadocMethod FOR NEXT 17 LINES. REASON: It is there.
/**
* Runs the query and returns the result as a list of Java JSONObjects.
* @param queryString the query.
* @return the query result as a List of JSONObjects.
* @throws GerritQueryException if Gerrit reports an error with the query.
* @throws SshException if there is an error in the SSH Connection.
* @throws IOException for some other IO problem.
*/
public List queryFiles(String queryString) throws
SshException, IOException, GerritQueryException {
return queryJava(queryString, false, true, true);
}
//CS IGNORE RedundantThrows FOR NEXT 17 LINES. REASON: Informative.
/**
* Runs the query and returns the result as a list of JSON formatted strings.
* This is the equivalent of calling queryJava(queryString, true, true).
* @param queryString the query.
* @return a List of JSON formatted strings.
* @throws SshException if there is an error in the SSH Connection.
* @throws IOException for some other IO problem.
*/
public List queryJson(String queryString) throws SshException, IOException {
return queryJson(queryString, true, true, false);
}
//CS IGNORE RedundantThrows FOR NEXT 17 LINES. REASON: Informative.
/**
* Runs the query and returns the result as a list of JSON formatted strings.
* @param queryString the query.
* @param getPatchSets if all patch-sets of the projects found should be included in the result.
* Meaning if --patch-sets should be appended to the command call.
* @param getCurrentPatchSet if the current patch-set for the projects found should be included in the result.
* Meaning if --current-patch-set should be appended to the command call.
* @param getFiles if the files of the patch sets should be included in the result.
* Meaning if --files should be appended to the command call.
* @return a List of JSON formatted strings.
* @throws SshException if there is an error in the SSH Connection.
* @throws IOException for some other IO problem.
*/
public List queryJson(String queryString, boolean getPatchSets, boolean getCurrentPatchSet, boolean getFiles)
throws SshException, IOException {
final List list = new LinkedList();
try {
runQuery(queryString, getPatchSets, getCurrentPatchSet, getFiles, new LineVisitor() {
@Override
public void visit(String line) {
list.add(line.trim());
}
});
} catch (GerritQueryException gqe) {
logger.error("This should not have happened!", gqe);
}
return list;
}
//CS IGNORE RedundantThrows FOR NEXT 18 LINES. REASON: Informative.
//CS IGNORE JavadocMethod FOR NEXT 17 LINES. REASON: It is there.
/**
* Runs the query on the Gerrit server and lets the provided visitor handle each line in the result.
* @param queryString the query.
* @param getPatchSets if all patch-sets of the projects found should be included in the result.
* Meaning if --patch-sets should be appended to the command call.
* @param getCurrentPatchSet if the current patch-set for the projects found should be included in the result.
* Meaning if --current-patch-set should be appended to the command call.
* @param visitor the visitor to handle each line in the result.
* @throws GerritQueryException if a visitor finds that Gerrit reported an error with the query.
* @throws SshException if there is an error in the SSH Connection.
* @throws IOException for some other IO problem.
*/
private void runQuery(String queryString, boolean getPatchSets, boolean getCurrentPatchSet, boolean getFiles,
LineVisitor visitor) throws GerritQueryException, SshException, IOException {
StringBuilder str = new StringBuilder(QUERY_COMMAND);
str.append(" --format=JSON");
if (getPatchSets) {
str.append(" --patch-sets");
}
if (getCurrentPatchSet) {
str.append(" --current-patch-set");
}
if (getFiles) {
str.append(" --files");
}
str.append(" \"").append(queryString.replace((CharSequence)"\"", (CharSequence)"\\\"")).append("\"");
SshConnection ssh = null;
try {
ssh = SshConnectionFactory.getConnection(gerritHostName, gerritSshPort, authentication);
BufferedReader reader = new BufferedReader(ssh.executeCommandReader(str.toString()));
String incomingLine = null;
while ((incomingLine = reader.readLine()) != null) {
logger.trace("Incoming line: {}", incomingLine);
visitor.visit(incomingLine);
}
logger.trace("Closing reader.");
reader.close();
} finally {
if (ssh != null) {
ssh.disconnect();
}
}
}
/**
* Internal visitor for handling a line of text.
* Used by {@link #runQuery(java.lang.String, boolean, boolean, boolean, LineVisitor)}.
*/
interface LineVisitor {
/**
* Visits a line of query result.
* @param line the line.
* @throws GerritQueryException if you want to.
*/
void visit(String line) throws GerritQueryException;
}
}
