From e8847361b00c991c7d2183ed913b75408f27e064 Mon Sep 17 00:00:00 2001
From: "Brian S. O'Neill" <bronee@gmail.com>
Date: Thu, 27 Mar 2008 00:26:33 +0000
Subject: Support multiple databases in one file.

---
 .../carbonado/repo/sleepycat/BDBRepository.java    | 36 +++++++++++++++++++---
 .../repo/sleepycat/BDBRepositoryBuilder.java       | 31 ++++++++++++++++++-
 2 files changed, 61 insertions(+), 6 deletions(-)

(limited to 'src/main/java/com/amazon/carbonado')

diff --git a/src/main/java/com/amazon/carbonado/repo/sleepycat/BDBRepository.java b/src/main/java/com/amazon/carbonado/repo/sleepycat/BDBRepository.java
index f12a58e..bbd4ea3 100644
--- a/src/main/java/com/amazon/carbonado/repo/sleepycat/BDBRepository.java
+++ b/src/main/java/com/amazon/carbonado/repo/sleepycat/BDBRepository.java
@@ -112,6 +112,7 @@ abstract class BDBRepository<Txn> extends AbstractRepository<Txn>
     final File mDataHome;
     final File mEnvHome;
     final String mSingleFileName;
+    final Map<Class<?>, String> mFileNameMap;
 
     private LayoutFactory mLayoutFactory;
 
@@ -156,6 +157,7 @@ abstract class BDBRepository<Txn> extends AbstractRepository<Txn>
         mDataHome = builder.getDataHomeFile();
         mEnvHome = builder.getEnvironmentHomeFile();
         mSingleFileName = builder.getSingleFileName();
+        mFileNameMap = builder.getFileNameMap();
     }
 
     @SuppressWarnings("unchecked")
@@ -352,16 +354,40 @@ abstract class BDBRepository<Txn> extends AbstractRepository<Txn>
         return mIsMaster;
     }
 
-    String getDatabaseFileName(String dbName) {
-        if (mSingleFileName != null) {
-            dbName = mSingleFileName;
+    String getDatabaseFileName(final String dbName) {
+        String singleFileName = mSingleFileName;
+        if (singleFileName == null && mFileNameMap != null) {
+            singleFileName = mFileNameMap.get(dbName);
+            if (singleFileName == null && dbName != null) {
+                singleFileName = mFileNameMap.get(null);
+            }
+        }
+
+        String dbFileName = dbName;
+
+        if (singleFileName != null) {
+            dbFileName = singleFileName;
         }
 
         if (mDataHome != null && !mDataHome.equals(mEnvHome)) {
-            dbName = new File(mDataHome, dbName).getPath();
+            dbFileName = new File(mDataHome, dbFileName).getPath();
         }
 
-        return dbName;
+        return dbFileName;
+    }
+
+    /**
+     * Returns null if name should not be used.
+     */
+    String getDatabaseName(final String dbName) {
+        if (mFileNameMap == null) {
+            return null;
+        }
+        String name = mFileNameMap.get(dbName);
+        if (name == null && dbName != null) {
+            name = mFileNameMap.get(null);
+        }
+        return name == null ? null : dbName;
     }
 
     StorableCodecFactory getStorableCodecFactory() {
diff --git a/src/main/java/com/amazon/carbonado/repo/sleepycat/BDBRepositoryBuilder.java b/src/main/java/com/amazon/carbonado/repo/sleepycat/BDBRepositoryBuilder.java
index fa24624..c965eff 100644
--- a/src/main/java/com/amazon/carbonado/repo/sleepycat/BDBRepositoryBuilder.java
+++ b/src/main/java/com/amazon/carbonado/repo/sleepycat/BDBRepositoryBuilder.java
@@ -85,6 +85,7 @@ public class BDBRepositoryBuilder extends AbstractRepositoryBuilder {
     private File mEnvHome;
     private File mDataHome;
     private String mSingleFileName;
+    private Map<Class<?>, String> mFileNames;
     private boolean mIndexSupport = true;
     private boolean mIndexRepairEnabled = true;
     private double mIndexThrottle = 1.0;
@@ -290,10 +291,13 @@ public class BDBRepositoryBuilder extends AbstractRepositoryBuilder {
      *
      * <p>Note: When setting this option, the storable codec factory must also
      * be changed, since the default storable codec factory is unable to
-     * distinguish storable types that reside in a single database file.
+     * distinguish storable types that reside in a single database file. Call
+     * setFileName instead to use built-in BDB feature for supporting multiple
+     * databases in one file.
      */
     public void setSingleFileName(String filename) {
         mSingleFileName = filename;
+        mFileNames = null;
     }
 
     /**
@@ -303,6 +307,31 @@ public class BDBRepositoryBuilder extends AbstractRepositoryBuilder {
         return mSingleFileName;
     }
 
+    /**
+     * Specify the file that a BDB database should reside in, except for log
+     * files and caches. The filename is relative to the environment home,
+     * unless data directories have been specified. For BDBRepositories that
+     * are log files only, this configuration is ignored.
+     *
+     * @param filename BDB database filename
+     * @param type type to store in file; if null, the file is used by default
+     * for all types
+     */
+    public void setFileName(String filename, Class<? extends Storable> type) {
+        mSingleFileName = null;
+        if (mFileNames == null) {
+            mFileNames = new HashMap<Class<?>, String>();
+        }
+        mFileNames.put(type, filename);
+    }
+
+    Map<Class<?>, String> getFileNameMap() {
+        if (mFileNames == null) {
+            return null;
+        }
+        return new HashMap<Class<?>, String>(mFileNames);
+    }
+
     /**
      * By default, user specified indexes are supported. Pass false to disable
      * this, and no indexes will be built. Another consequence of this option
-- 
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