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package org.mule.util.queue; |
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import org.mule.RegistryContext; |
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import org.mule.api.MuleContext; |
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import org.mule.api.context.MuleContextAware; |
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import org.mule.util.FileUtils; |
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import org.mule.util.file.DeleteException; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.FileNotFoundException; |
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import java.io.FileOutputStream; |
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import java.io.IOException; |
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import java.io.ObjectInputStream; |
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import java.io.ObjectOutputStream; |
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import java.util.ArrayList; |
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import java.util.List; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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import org.safehaus.uuid.UUIDGenerator; |
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public class FilePersistenceStrategy implements QueuePersistenceStrategy, MuleContextAware |
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{ |
35 | 2 | private static final Log logger = LogFactory.getLog(FilePersistenceStrategy.class); |
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public static final String DEFAULT_QUEUE_STORE = "queuestore"; |
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public static final String EXTENSION = ".msg"; |
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private File store; |
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44 | 1176 | private UUIDGenerator gen = UUIDGenerator.getInstance(); |
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protected MuleContext muleContext; |
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public FilePersistenceStrategy() |
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{ |
50 | 1176 | super(); |
51 | 1176 | } |
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public void setMuleContext(MuleContext context) |
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{ |
56 | 0 | this.muleContext = context; |
57 | 0 | } |
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protected String getId(Object obj) |
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{ |
61 | 1020 | String id = gen.generateRandomBasedUUID().toString(); |
62 | 1020 | return id; |
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} |
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public Object store(String queue, Object obj) throws IOException |
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{ |
72 | 1020 | String id = getId(obj); |
73 | 1020 | File file = FileUtils.newFile(store, queue + File.separator + id + EXTENSION); |
74 | 1020 | file.getParentFile().mkdirs(); |
75 | 1020 | ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(file)); |
76 | 1020 | oos.writeObject(obj); |
77 | 1020 | oos.close(); |
78 | 1020 | return id; |
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} |
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public void remove(String queue, Object id) throws IOException |
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{ |
88 | 1020 | File file = FileUtils.newFile(store, queue + File.separator + id + EXTENSION); |
89 | 1020 | if (file.exists()) |
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{ |
91 | 1020 | if (!file.delete()) |
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{ |
93 | 0 | throw new DeleteException(file); |
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} |
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} |
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else |
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{ |
98 | 0 | throw new FileNotFoundException(file.toString()); |
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} |
100 | 1020 | } |
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public Object load(String queue, Object id) throws IOException |
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{ |
109 | 1024 | File file = FileUtils.newFile(store, queue + File.separator + id + EXTENSION); |
110 | 1024 | ObjectInputStream ois = null; |
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try |
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{ |
113 | 1024 | ois = new ObjectInputStream(new FileInputStream(file)); |
114 | 1024 | Object obj = ois.readObject(); |
115 | 1024 | return obj; |
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} |
117 | 0 | catch (ClassNotFoundException e) |
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{ |
119 | 0 | throw (IOException) new IOException("Error loading persistent object").initCause(e); |
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} |
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finally |
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{ |
123 | 1024 | if (ois != null) |
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{ |
125 | 1024 | ois.close(); |
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} |
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} |
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} |
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public List restore() throws IOException |
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{ |
137 | 30 | List msgs = new ArrayList(); |
138 | 30 | if (store == null) |
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{ |
140 | 0 | logger.warn("No store has be set on the File Persistence Strategy. Not restoring at this time"); |
141 | 0 | return msgs; |
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} |
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try |
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{ |
145 | 30 | restoreFiles(store, msgs); |
146 | 30 | logger.debug("Restore retrieved " + msgs.size() + " objects"); |
147 | 30 | return msgs; |
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} |
149 | 0 | catch (ClassNotFoundException e) |
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{ |
151 | 0 | throw (IOException) new IOException("Could not restore").initCause(e); |
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} |
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} |
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protected void restoreFiles(File dir, List msgs) throws IOException, ClassNotFoundException |
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{ |
157 | 34 | File[] files = dir.listFiles(); |
158 | 34 | if (files == null) |
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{ |
160 | 0 | return; |
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} |
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163 | 42 | for (int i = 0; i < files.length; i++) |
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{ |
165 | 8 | if (files[i].isDirectory()) |
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{ |
167 | 4 | restoreFiles(files[i], msgs); |
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} |
169 | 4 | else if (files[i].getName().endsWith(EXTENSION)) |
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{ |
171 | 4 | String id = files[i].getCanonicalPath(); |
172 | 4 | id = id.substring(store.getCanonicalPath().length() + 1, id.length() - EXTENSION.length()); |
173 | 4 | String queue = id.substring(0, id.indexOf(File.separator)); |
174 | 4 | id = id.substring(queue.length() + 1); |
175 | 4 | msgs.add(new HolderImpl(queue, id)); |
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} |
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} |
178 | 34 | } |
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public void open() throws IOException |
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{ |
187 | 30 | String path = RegistryContext.getConfiguration().getWorkingDirectory() + File.separator + DEFAULT_QUEUE_STORE; |
188 | 30 | store = FileUtils.newFile(path).getCanonicalFile(); |
189 | 30 | store.mkdirs(); |
190 | 30 | } |
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public void close() throws IOException |
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{ |
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200 | 30 | } |
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protected static class HolderImpl implements Holder |
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{ |
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private String queue; |
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private Object id; |
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public HolderImpl(String queue, Object id) |
208 | 4 | { |
209 | 4 | this.queue = queue; |
210 | 4 | this.id = id; |
211 | 4 | } |
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public Object getId() |
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{ |
215 | 4 | return id; |
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} |
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public String getQueue() |
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{ |
220 | 4 | return queue; |
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} |
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} |
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public boolean isTransient() |
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{ |
226 | 0 | return false; |
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} |
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} |