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package org.paneris.bibliomania.fti; |
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|
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import java.io.File; |
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import java.io.FileNotFoundException; |
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|
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import com.sleepycat.db.Database; |
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import com.sleepycat.db.DatabaseConfig; |
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import com.sleepycat.db.DatabaseType; |
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import com.sleepycat.db.Environment; |
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import com.sleepycat.db.DatabaseException; |
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import com.sleepycat.db.LockMode; |
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import com.sleepycat.db.MemoryException; |
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import com.sleepycat.db.DatabaseEntry; |
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import com.sleepycat.db.OperationStatus; |
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|
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public class StringDbHash { |
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private Database db; |
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private DatabaseConfig dbConfig; |
19 | 0 | private DatabaseEntry keyDatabaseEntry = new DatabaseEntry(), valueDatabaseEntry = new DatabaseEntry(); |
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private String path; |
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|
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public StringDbHash(Environment env, String path, int cacheSize, int mode) |
23 | 0 | throws DatabaseException, FileNotFoundException { |
24 | 0 | this.path = path; |
25 | 0 | dbConfig = new DatabaseConfig(); |
26 | 0 | dbConfig.setCacheSize(cacheSize); |
27 | 0 | dbConfig.setAllowCreate(true); |
28 | 0 | dbConfig.setType(DatabaseType.HASH); |
29 | 0 | db = new Database(path, null, dbConfig); |
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|
31 | 0 | } |
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|
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public StringDbHash(String path, int cacheSize, int mode) |
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throws DatabaseException, FileNotFoundException { |
35 | 0 | this(null, path, cacheSize, mode); |
36 | 0 | } |
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|
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public StringDbHash(Environment env, String path, int cacheSize) |
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throws DatabaseException, FileNotFoundException { |
40 | 0 | this(env, path, cacheSize, 0644); |
41 | 0 | } |
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|
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public StringDbHash(String path, int cacheSize) |
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throws DatabaseException, FileNotFoundException { |
45 | 0 | this(null, path, cacheSize); |
46 | 0 | } |
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|
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public synchronized void put(String key, String value) { |
49 | 0 | DbUtils.setUserMem(keyDatabaseEntry, key.getBytes()); |
50 | 0 | DbUtils.setUserMem(valueDatabaseEntry, value.getBytes()); |
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|
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try { |
53 | 0 | db.put(null, keyDatabaseEntry, valueDatabaseEntry); |
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} |
55 | 0 | catch (DatabaseException e) { |
56 | 0 | throw new DbUtils.UnexpectedDatabaseExceptionException(e, path); |
57 | 0 | } |
58 | 0 | } |
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|
60 | 0 | private byte[] buf = new byte[100]; |
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|
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public synchronized String get(String key) { |
63 | 0 | DbUtils.setUserMem(keyDatabaseEntry, key.getBytes()); |
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|
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OperationStatus result; |
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for (;;) { |
67 | 0 | DbUtils.setUserMem(valueDatabaseEntry, buf); |
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try { |
69 | 0 | result = db.get(null, keyDatabaseEntry, valueDatabaseEntry,LockMode.DEFAULT); |
70 | 0 | break; |
71 | 0 | } catch (MemoryException e) { |
72 | 0 | buf = new byte[buf.length * 2]; |
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} |
74 | 0 | catch (DatabaseException e) { |
75 | 0 | throw new DbUtils.UnexpectedDatabaseExceptionException(e, path); |
76 | 0 | } |
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} |
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|
79 | 0 | if (buf.length > 10000) |
80 | 0 | buf = new byte[10000]; |
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|
82 | 0 | return result == OperationStatus.SUCCESS ? |
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new String(valueDatabaseEntry.getData(), 0, valueDatabaseEntry.getSize()) : null; |
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} |
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|
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public void flush() { |
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try { |
88 | 0 | db.sync(); |
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} |
90 | 0 | catch (DatabaseException e) { |
91 | 0 | throw new DbUtils.UnexpectedDatabaseExceptionException(e, path); |
92 | 0 | } |
93 | 0 | } |
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|
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protected void finalize() throws Throwable { |
96 | 0 | db.close(); |
97 | 0 | } |
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public static void main(String[] args) throws Exception { |
99 | 0 | StringDbHash h = new StringDbHash(null, "/tmp/test.db", 0); |
100 | 0 | int e = args[0].indexOf('='); |
101 | 0 | if (e == -1) |
102 | 0 | System.out.println(h.get(args[0])); |
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else |
104 | 0 | h.put(args[0].substring(0, e), args[0].substring(e + 1)); |
105 | 0 | h.flush(); |
106 | 0 | } |
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} |