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package org.mule.util.queue; |
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import org.mule.api.MuleContext; |
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import org.mule.api.MuleException; |
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import org.mule.api.context.MuleContextAware; |
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import org.mule.api.transformer.wire.WireFormat; |
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import org.mule.transformer.wire.SerializationWireFormat; |
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import org.mule.util.FileUtils; |
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import org.mule.util.UUID; |
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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.InputStream; |
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import java.io.OutputStream; |
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import java.util.ArrayList; |
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import java.util.Arrays; |
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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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public class FilePersistenceStrategy implements QueuePersistenceStrategy, MuleContextAware |
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{ |
38 | 0 | 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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protected MuleContext muleContext; |
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private WireFormat serializer; |
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public FilePersistenceStrategy(WireFormat serializer) |
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{ |
53 | 0 | super(); |
54 | 0 | this.serializer = serializer; |
55 | 0 | } |
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public FilePersistenceStrategy() |
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{ |
59 | 0 | this(new SerializationWireFormat()); |
60 | 0 | } |
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public void setMuleContext(MuleContext context) |
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{ |
64 | 0 | this.muleContext = context; |
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|
66 | 0 | serializer.setMuleContext(muleContext); |
67 | 0 | } |
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public Object store(String queue, Object obj) throws IOException |
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{ |
71 | 0 | String id = UUID.getUUID(); |
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|
73 | 0 | String filename = queue + File.separator + id + EXTENSION; |
74 | 0 | File file = FileUtils.newFile(store, filename); |
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|
76 | 0 | if (!file.getParentFile().exists()) |
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{ |
78 | 0 | createStoreDirectory(file.getParentFile()); |
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} |
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|
81 | 0 | OutputStream out = new FileOutputStream(file); |
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try |
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{ |
84 | 0 | serializer.write(out, obj, muleContext.getConfiguration().getDefaultEncoding()); |
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} |
86 | 0 | catch (MuleException e) |
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{ |
88 | 0 | IOException iox = new IOException(); |
89 | 0 | iox.initCause(e); |
90 | 0 | throw iox; |
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} |
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finally |
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{ |
94 | 0 | out.close(); |
95 | 0 | } |
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|
97 | 0 | return id; |
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} |
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protected synchronized void createStoreDirectory(File direcetory) throws IOException |
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{ |
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104 | 0 | if (!direcetory.exists() && !direcetory.mkdirs()) |
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{ |
106 | 0 | throw new IOException("Failed to create directory: " + direcetory.getAbsolutePath()); |
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} |
108 | 0 | } |
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public void remove(String queue, Object id) throws IOException |
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{ |
112 | 0 | String fileName = queue + File.separator + id + EXTENSION; |
113 | 0 | File file = FileUtils.newFile(store, fileName); |
114 | 0 | if (file.exists()) |
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{ |
116 | 0 | if (!file.delete()) |
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{ |
118 | 0 | throw new DeleteException(file); |
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} |
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} |
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else |
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{ |
123 | 0 | throw new FileNotFoundException(file.getAbsolutePath()); |
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} |
125 | 0 | } |
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|
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public Object load(String queue, Object id) throws IOException |
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{ |
129 | 0 | String fileName = queue + File.separator + id + EXTENSION; |
130 | 0 | File file = FileUtils.newFile(store, fileName); |
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|
132 | 0 | InputStream in = new FileInputStream(file); |
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try |
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{ |
135 | 0 | return serializer.read(in); |
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} |
137 | 0 | catch (MuleException e) |
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{ |
139 | 0 | IOException iox = new IOException(e.getDetailedMessage()); |
140 | 0 | iox.initCause(e); |
141 | 0 | throw iox; |
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} |
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finally |
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{ |
145 | 0 | in.close(); |
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} |
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} |
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|
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public List<Holder> restore() throws IOException |
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{ |
151 | 0 | List<Holder> msgs = new ArrayList<Holder>(); |
152 | 0 | if (store == null) |
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{ |
154 | 0 | logger.warn("No store has be set on the File Persistence Strategy. Not restoring at this time"); |
155 | 0 | return msgs; |
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} |
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|
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try |
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{ |
160 | 0 | restoreFiles(store, msgs); |
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|
162 | 0 | if (logger.isDebugEnabled()) |
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{ |
164 | 0 | logger.debug("Restore retrieved " + msgs.size() + " objects"); |
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} |
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|
167 | 0 | return msgs; |
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} |
169 | 0 | catch (ClassNotFoundException e) |
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{ |
171 | 0 | throw (IOException) new IOException("Could not restore").initCause(e); |
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} |
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} |
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|
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protected void restoreFiles(File dir, List<Holder> msgs) throws IOException, ClassNotFoundException |
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{ |
177 | 0 | File[] files = dir.listFiles(); |
178 | 0 | if (files == null) |
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{ |
180 | 0 | return; |
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} |
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|
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|
184 | 0 | Arrays.sort(files); |
185 | 0 | for (int i = 0; i < files.length; i++) |
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{ |
187 | 0 | if (files[i].isDirectory()) |
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{ |
189 | 0 | restoreFiles(files[i], msgs); |
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} |
191 | 0 | else if (files[i].getName().endsWith(EXTENSION)) |
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{ |
193 | 0 | String id = files[i].getCanonicalPath(); |
194 | 0 | id = id.substring(store.getCanonicalPath().length() + 1, id.length() - EXTENSION.length()); |
195 | 0 | String queue = id.substring(0, id.indexOf(File.separator)); |
196 | 0 | id = id.substring(queue.length() + 1); |
197 | 0 | msgs.add(new HolderImpl(queue, id)); |
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} |
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} |
200 | 0 | } |
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public void open() throws IOException |
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{ |
204 | 0 | String path = muleContext.getConfiguration().getWorkingDirectory() + File.separator + DEFAULT_QUEUE_STORE; |
205 | 0 | store = FileUtils.newFile(path).getCanonicalFile(); |
206 | 0 | if (!store.exists()) |
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{ |
208 | 0 | createStoreDirectory(store); |
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} |
210 | 0 | } |
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public void close() throws IOException |
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{ |
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|
215 | 0 | } |
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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) |
223 | 0 | { |
224 | 0 | this.queue = queue; |
225 | 0 | this.id = id; |
226 | 0 | } |
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public Object getId() |
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{ |
230 | 0 | return id; |
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} |
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public String getQueue() |
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{ |
235 | 0 | return queue; |
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} |
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} |
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public boolean isTransient() |
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{ |
241 | 0 | return false; |
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} |
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} |