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37 package net.sourceforge.cruisecontrol.config;
38
39 import net.sourceforge.cruisecontrol.ConfigManager;
40 import net.sourceforge.cruisecontrol.CruiseControlConfig;
41 import net.sourceforge.cruisecontrol.ProjectConfig;
42 import net.sourceforge.cruisecontrol.CruiseControlException;
43
44 import net.sourceforge.cruisecontrol.util.Util;
45
46 import java.io.File  ;
47 import java.io.IOException ;
48 import java.io.ByteArrayOutputStream ;
49 import java.util.Set ;
50 import java.util.Collections ;
51
52 import org.jdom.Element;
53 import org.jdom.output.XMLOutputter;
54
55 import org.apache.log4j.Logger;
56 import com.twmacinta.util.MD5OutputStream;
57
58
63 public class XMLConfigManager implements ConfigManager {
64
65 private static final Logger LOG = Logger.getLogger(XMLConfigManager.class);
66 private File configFile;
67 private CruiseControlConfig config = new CruiseControlConfig();
68 private String hash;
69
70 public XMLConfigManager(File file) throws CruiseControlException {
71 setConfigFile(file);
72 }
73
74 private void loadConfig(File file) throws CruiseControlException {
75 LOG.info("reading settings from config file [" + file.getAbsolutePath() + "]");
76 Element element = Util.loadConfigFile(file);
77 config = new CruiseControlConfig();
78 config.configure(element);
79 }
80
81 public void setConfigFile(File fileName) throws CruiseControlException {
82 LOG.debug("Config file set to [" + fileName + "]");
83 configFile = fileName;
84 LOG.debug("Calculating MD5 [" + configFile.getAbsolutePath() + "]");
85 hash = calculateMD5(configFile);
86 loadConfig(configFile);
87 }
88
89 public Set getProjectNames() {
90 return Collections.unmodifiableSet(config.getProjectNames());
91 }
92
93 public boolean reloadIfNecessary() throws CruiseControlException {
94 LOG.debug("Calculating MD5 [" + configFile.getAbsolutePath() + "]");
95 String newHash = calculateMD5(configFile);
96 final boolean fileChanged = !newHash.equals(hash);
97 if (fileChanged) {
98 loadConfig(configFile);
99 hash = newHash;
100 }
101 return fileChanged;
102 }
103
104 public ProjectConfig getConfig(String projectName) throws CruiseControlException {
105 LOG.info("using settings from config file [" + configFile.getAbsolutePath() + "]");
106 return config.getConfig(projectName);
107 }
108
109 public File getConfigFile() {
110 return configFile;
111 }
112
113 public static String calculateMD5(File file) {
114 String md5 = null;
115 MD5OutputStream stream = null;
116 try {
117 Element element = Util.loadConfigFile(file);
118 stream = new MD5OutputStream(new ByteArrayOutputStream ());
119 XMLOutputter outputter = new XMLOutputter();
120 outputter.output(element, stream);
121 md5 = stream.getMD5().asHex();
122 } catch (IOException e) {
123 LOG.error("exception calculating MD5 of config file " + file.getAbsolutePath(), e);
124 } catch (CruiseControlException e) {
125 LOG.error("exception calculating MD5 of config file " + file.getAbsolutePath(), e);
126 } finally {
127 if (stream != null) {
128 try {
129 stream.close();
130 } catch (IOException ignore) {
131 }
132 }
133 }
134 return md5;
135 }
136
137
138 public CruiseControlConfig getCruiseControlConfig() {
139 return config;
140 }
141 }
142 |
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