1 | |
|
2 | |
|
3 | |
|
4 | |
|
5 | |
|
6 | |
|
7 | |
package org.mule.util.queue; |
8 | |
|
9 | |
import org.mule.api.MuleContext; |
10 | |
import org.mule.api.MuleException; |
11 | |
import org.mule.api.context.MuleContextAware; |
12 | |
import org.mule.api.transformer.wire.WireFormat; |
13 | |
import org.mule.transformer.wire.SerializationWireFormat; |
14 | |
import org.mule.util.FileUtils; |
15 | |
import org.mule.util.UUID; |
16 | |
import org.mule.util.file.DeleteException; |
17 | |
|
18 | |
import java.io.File; |
19 | |
import java.io.FileInputStream; |
20 | |
import java.io.FileNotFoundException; |
21 | |
import java.io.FileOutputStream; |
22 | |
import java.io.IOException; |
23 | |
import java.io.InputStream; |
24 | |
import java.io.OutputStream; |
25 | |
import java.util.ArrayList; |
26 | |
import java.util.Arrays; |
27 | |
import java.util.List; |
28 | |
|
29 | |
import org.apache.commons.logging.Log; |
30 | |
import org.apache.commons.logging.LogFactory; |
31 | |
|
32 | |
public class FilePersistenceStrategy implements QueuePersistenceStrategy, MuleContextAware |
33 | |
{ |
34 | 0 | private static final Log logger = LogFactory.getLog(FilePersistenceStrategy.class); |
35 | |
|
36 | |
|
37 | |
public static final String DEFAULT_QUEUE_STORE = "queuestore"; |
38 | |
|
39 | |
public static final String EXTENSION = ".msg"; |
40 | |
|
41 | |
private File store; |
42 | |
|
43 | |
protected MuleContext muleContext; |
44 | |
|
45 | |
private WireFormat serializer; |
46 | |
|
47 | |
public FilePersistenceStrategy(WireFormat serializer) |
48 | |
{ |
49 | 0 | super(); |
50 | 0 | this.serializer = serializer; |
51 | 0 | } |
52 | |
|
53 | |
public FilePersistenceStrategy() |
54 | |
{ |
55 | 0 | this(new SerializationWireFormat()); |
56 | 0 | } |
57 | |
|
58 | |
public void setMuleContext(MuleContext context) |
59 | |
{ |
60 | 0 | this.muleContext = context; |
61 | |
|
62 | 0 | serializer.setMuleContext(muleContext); |
63 | 0 | } |
64 | |
|
65 | |
public Object store(String queue, Object obj) throws IOException |
66 | |
{ |
67 | 0 | String id = UUID.getUUID(); |
68 | |
|
69 | 0 | String filename = queue + File.separator + id + EXTENSION; |
70 | 0 | File file = FileUtils.newFile(store, filename); |
71 | |
|
72 | 0 | if (!file.getParentFile().exists()) |
73 | |
{ |
74 | 0 | createStoreDirectory(file.getParentFile()); |
75 | |
} |
76 | |
|
77 | 0 | OutputStream out = new FileOutputStream(file); |
78 | |
try |
79 | |
{ |
80 | 0 | serializer.write(out, obj, muleContext.getConfiguration().getDefaultEncoding()); |
81 | |
} |
82 | 0 | catch (MuleException e) |
83 | |
{ |
84 | 0 | IOException iox = new IOException(); |
85 | 0 | iox.initCause(e); |
86 | 0 | throw iox; |
87 | |
} |
88 | |
finally |
89 | |
{ |
90 | 0 | out.close(); |
91 | 0 | } |
92 | |
|
93 | 0 | return id; |
94 | |
} |
95 | |
|
96 | |
protected synchronized void createStoreDirectory(File direcetory) throws IOException |
97 | |
{ |
98 | |
|
99 | |
|
100 | 0 | if (!direcetory.exists() && !direcetory.mkdirs()) |
101 | |
{ |
102 | 0 | throw new IOException("Failed to create directory: " + direcetory.getAbsolutePath()); |
103 | |
} |
104 | 0 | } |
105 | |
|
106 | |
public void remove(String queue, Object id) throws IOException |
107 | |
{ |
108 | 0 | String fileName = queue + File.separator + id + EXTENSION; |
109 | 0 | File file = FileUtils.newFile(store, fileName); |
110 | 0 | if (file.exists()) |
111 | |
{ |
112 | 0 | if (!file.delete()) |
113 | |
{ |
114 | 0 | throw new DeleteException(file); |
115 | |
} |
116 | |
} |
117 | |
else |
118 | |
{ |
119 | 0 | throw new FileNotFoundException(file.getAbsolutePath()); |
120 | |
} |
121 | 0 | } |
122 | |
|
123 | |
public Object load(String queue, Object id) throws IOException |
124 | |
{ |
125 | 0 | String fileName = queue + File.separator + id + EXTENSION; |
126 | 0 | File file = FileUtils.newFile(store, fileName); |
127 | |
|
128 | 0 | InputStream in = new FileInputStream(file); |
129 | |
try |
130 | |
{ |
131 | 0 | return serializer.read(in); |
132 | |
} |
133 | 0 | catch (MuleException e) |
134 | |
{ |
135 | 0 | IOException iox = new IOException(e.getDetailedMessage()); |
136 | 0 | iox.initCause(e); |
137 | 0 | throw iox; |
138 | |
} |
139 | |
finally |
140 | |
{ |
141 | 0 | in.close(); |
142 | |
} |
143 | |
} |
144 | |
|
145 | |
public List<Holder> restore() throws IOException |
146 | |
{ |
147 | 0 | List<Holder> msgs = new ArrayList<Holder>(); |
148 | 0 | if (store == null) |
149 | |
{ |
150 | 0 | logger.warn("No store has be set on the File Persistence Strategy. Not restoring at this time"); |
151 | 0 | return msgs; |
152 | |
} |
153 | |
|
154 | |
try |
155 | |
{ |
156 | 0 | restoreFiles(store, msgs); |
157 | |
|
158 | 0 | if (logger.isDebugEnabled()) |
159 | |
{ |
160 | 0 | logger.debug("Restore retrieved " + msgs.size() + " objects"); |
161 | |
} |
162 | |
|
163 | 0 | return msgs; |
164 | |
} |
165 | 0 | catch (ClassNotFoundException e) |
166 | |
{ |
167 | 0 | throw (IOException) new IOException("Could not restore").initCause(e); |
168 | |
} |
169 | |
} |
170 | |
|
171 | |
protected void restoreFiles(File dir, List<Holder> msgs) throws IOException, ClassNotFoundException |
172 | |
{ |
173 | 0 | File[] files = dir.listFiles(); |
174 | 0 | if (files == null) |
175 | |
{ |
176 | 0 | return; |
177 | |
} |
178 | |
|
179 | |
|
180 | 0 | Arrays.sort(files); |
181 | 0 | for (int i = 0; i < files.length; i++) |
182 | |
{ |
183 | 0 | if (files[i].isDirectory()) |
184 | |
{ |
185 | 0 | restoreFiles(files[i], msgs); |
186 | |
} |
187 | 0 | else if (files[i].getName().endsWith(EXTENSION)) |
188 | |
{ |
189 | 0 | if (files[i].length() == 0) |
190 | |
{ |
191 | 0 | FileUtils.deleteQuietly(files[i]); |
192 | 0 | logger.debug("Removing zero size file: " + files[i].getAbsolutePath()); |
193 | 0 | continue; |
194 | |
} |
195 | |
|
196 | 0 | String id = files[i].getCanonicalPath(); |
197 | 0 | id = id.substring(store.getCanonicalPath().length() + 1, id.length() - EXTENSION.length()); |
198 | 0 | String queue = id.substring(0, id.indexOf(File.separator)); |
199 | 0 | id = id.substring(queue.length() + 1); |
200 | 0 | msgs.add(new HolderImpl(queue, id)); |
201 | |
} |
202 | |
} |
203 | 0 | } |
204 | |
|
205 | |
public void open() throws IOException |
206 | |
{ |
207 | 0 | String path = muleContext.getConfiguration().getWorkingDirectory() + File.separator + DEFAULT_QUEUE_STORE; |
208 | 0 | store = FileUtils.newFile(path).getCanonicalFile(); |
209 | 0 | if (!store.exists()) |
210 | |
{ |
211 | 0 | createStoreDirectory(store); |
212 | |
} |
213 | 0 | } |
214 | |
|
215 | |
public void close() throws IOException |
216 | |
{ |
217 | |
|
218 | 0 | } |
219 | |
|
220 | |
protected static class HolderImpl implements Holder |
221 | |
{ |
222 | |
private String queue; |
223 | |
private Object id; |
224 | |
|
225 | |
public HolderImpl(String queue, Object id) |
226 | 0 | { |
227 | 0 | this.queue = queue; |
228 | 0 | this.id = id; |
229 | 0 | } |
230 | |
|
231 | |
public Object getId() |
232 | |
{ |
233 | 0 | return id; |
234 | |
} |
235 | |
|
236 | |
public String getQueue() |
237 | |
{ |
238 | 0 | return queue; |
239 | |
} |
240 | |
} |
241 | |
|
242 | |
public boolean isTransient() |
243 | |
{ |
244 | 0 | return false; |
245 | |
} |
246 | |
} |