Remove unused DB code for managing disk space.

bramble-api/src/main/java/org/briarproject/bramble/api/db/DatabaseConfig.java

@@ -10,6 +10,4 @@ public interface DatabaseConfig {
 	File getDatabaseDirectory();
 
 	File getDatabaseKeyDirectory();
-
-	long getMaxSize();
 }

bramble-core/src/main/java/org/briarproject/bramble/db/Database.java

@@ -237,13 +237,6 @@ interface Database<T> {
 	 */
 	Collection<ContactId> getContacts(T txn, AuthorId a) throws DbException;
 
-	/**
-	 * Returns the amount of free storage space available to the database, in
-	 * bytes. This is based on the minimum of the space available on the device
-	 * where the database is stored and the database's configured size.
-	 */
-	long getFreeSpace() throws DbException;
-
 	/**
 	 * Returns the group with the given ID.
 	 * <p/>

bramble-core/src/main/java/org/briarproject/bramble/db/H2Database.java

@@ -76,30 +76,6 @@ class H2Database extends JdbcDatabase {
 		}
 	}
 
-	@Override
-	public long getFreeSpace() {
-		File dir = config.getDatabaseDirectory();
-		long maxSize = config.getMaxSize();
-		long free = dir.getFreeSpace();
-		long used = getDiskSpace(dir);
-		long quota = maxSize - used;
-		return Math.min(free, quota);
-	}
-
-	private long getDiskSpace(File f) {
-		if (f.isDirectory()) {
-			long total = 0;
-			File[] children = f.listFiles();
-			if (children != null)
-				for (File child : children) total += getDiskSpace(child);
-			return total;
-		} else if (f.isFile()) {
-			return f.length();
-		} else {
-			return 0;
-		}
-	}
-
 	@Override
 	protected Connection createConnection() throws SQLException {
 		SecretKey key = this.key;

bramble-core/src/main/java/org/briarproject/bramble/db/HyperSqlDatabase.java

@@ -86,30 +86,6 @@ class HyperSqlDatabase extends JdbcDatabase {
 		}
 	}
 
-	@Override
-	public long getFreeSpace() {
-		File dir = config.getDatabaseDirectory();
-		long maxSize = config.getMaxSize();
-		long free = dir.getFreeSpace();
-		long used = getDiskSpace(dir);
-		long quota = maxSize - used;
-		return Math.min(free, quota);
-	}
-
-	private long getDiskSpace(File f) {
-		if (f.isDirectory()) {
-			long total = 0;
-			File[] children = f.listFiles();
-			if (children != null)
-				for (File child : children) total += getDiskSpace(child);
-			return total;
-		} else if (f.isFile()) {
-			return f.length();
-		} else {
-			return 0;
-		}
-	}
-
 	@Override
 	protected Connection createConnection() throws SQLException {
 		SecretKey key = this.key;

bramble-core/src/test/java/org/briarproject/bramble/db/DatabaseMigrationTest.java

@@ -45,8 +45,7 @@ public abstract class DatabaseMigrationTest extends BrambleMockTestCase {
 	private final Migration<Connection> migration1 =
 			context.mock(Migration.class, "migration1");
 
-	protected final DatabaseConfig config =
+	protected final DatabaseConfig config = new TestDatabaseConfig(testDir);
-			new TestDatabaseConfig(testDir, 1024 * 1024);
 	protected final MessageFactory messageFactory = new TestMessageFactory();
 	protected final SecretKey key = getSecretKey();
 	protected final Clock clock = new SystemClock();

bramble-core/src/test/java/org/briarproject/bramble/db/DatabasePerformanceComparisonTest.java

@@ -76,8 +76,8 @@ public abstract class DatabasePerformanceComparisonTest
 	private Database<Connection> openDatabase(boolean conditionA)
 			throws DbException {
 		Database<Connection> db = createDatabase(conditionA,
-				new TestDatabaseConfig(testDir, MAX_SIZE),
+				new TestDatabaseConfig(testDir), new TestMessageFactory(),
-				new TestMessageFactory(), new SystemClock());
+				new SystemClock());
 		db.open(databaseKey, null);
 		return db;
 	}

bramble-core/src/test/java/org/briarproject/bramble/db/DatabasePerformanceTest.java

@@ -50,7 +50,6 @@ import static org.junit.Assert.assertTrue;
 public abstract class DatabasePerformanceTest extends BrambleTestCase {
 
 	private static final int ONE_MEGABYTE = 1024 * 1024;
-	static final int MAX_SIZE = 100 * ONE_MEGABYTE;
 
 	/**
 	 * How many contacts to simulate.

bramble-core/src/test/java/org/briarproject/bramble/db/DatabaseTraceTest.java

@@ -48,8 +48,8 @@ public abstract class DatabaseTraceTest extends DatabasePerformanceTest {
 
 	private Database<Connection> openDatabase() throws DbException {
 		Database<Connection> db = createDatabase(
-				new TestDatabaseConfig(testDir, MAX_SIZE),
+				new TestDatabaseConfig(testDir), new TestMessageFactory(),
-				new TestMessageFactory(), new SystemClock());
+				new SystemClock());
 		db.open(databaseKey, null);
 		return db;
 	}

bramble-core/src/test/java/org/briarproject/bramble/db/JdbcDatabaseTest.java

@@ -57,7 +57,6 @@ import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_AUTHOR_N
 import static org.briarproject.bramble.api.sync.Group.Visibility.INVISIBLE;
 import static org.briarproject.bramble.api.sync.Group.Visibility.SHARED;
 import static org.briarproject.bramble.api.sync.Group.Visibility.VISIBLE;
-import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_BODY_LENGTH;
 import static org.briarproject.bramble.api.sync.validation.MessageState.DELIVERED;
 import static org.briarproject.bramble.api.sync.validation.MessageState.INVALID;
 import static org.briarproject.bramble.api.sync.validation.MessageState.PENDING;
@@ -88,7 +87,6 @@ import static org.junit.Assert.fail;
 public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 	private static final int ONE_MEGABYTE = 1024 * 1024;
-	private static final int MAX_SIZE = 5 * ONE_MEGABYTE;
 	// All our transports use a maximum latency of 30 seconds
 	private static final int MAX_LATENCY = 30 * 1000;
 
@@ -454,29 +452,6 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		db.close();
 	}
 
-	@Test
-	public void testGetFreeSpace() throws Exception {
-		Message message = getMessage(groupId, MAX_MESSAGE_BODY_LENGTH);
-		Database<Connection> db = open(false);
-
-		// Sanity check: there should be enough space on disk for this test
-		assertTrue(testDir.getFreeSpace() > MAX_SIZE);
-
-		// The free space should not be more than the allowed maximum size
-		long free = db.getFreeSpace();
-		assertTrue(free <= MAX_SIZE);
-		assertTrue(free > 0);
-
-		// Storing a message should reduce the free space
-		Connection txn = db.startTransaction();
-		db.addGroup(txn, group);
-		db.addMessage(txn, message, DELIVERED, true, null);
-		db.commitTransaction(txn);
-		assertTrue(db.getFreeSpace() < free);
-
-		db.close();
-	}
-
 	@Test
 	public void testCloseWaitsForCommit() throws Exception {
 		CountDownLatch closing = new CountDownLatch(1);
@@ -1996,9 +1971,8 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 	private Database<Connection> open(boolean resume,
 			MessageFactory messageFactory, Clock clock) throws Exception {
-		Database<Connection> db =
+		Database<Connection> db = createDatabase(
-				createDatabase(new TestDatabaseConfig(testDir, MAX_SIZE),
+				new TestDatabaseConfig(testDir), messageFactory, clock);
-						messageFactory, clock);
 		if (!resume) deleteTestDirectory(testDir);
 		db.open(key, null);
 		return db;

bramble-core/src/test/java/org/briarproject/bramble/db/SingleDatabasePerformanceTest.java

@@ -45,8 +45,8 @@ public abstract class SingleDatabasePerformanceTest
 
 	private Database<Connection> openDatabase() throws DbException {
 		Database<Connection> db = createDatabase(
-				new TestDatabaseConfig(testDir, MAX_SIZE),
+				new TestDatabaseConfig(testDir), new TestMessageFactory(),
-				new TestMessageFactory(), new SystemClock());
+				new SystemClock());
 		db.open(databaseKey, null);
 		return db;
 	}

bramble-core/src/test/java/org/briarproject/bramble/test/TestDatabaseConfig.java

@@ -9,12 +9,10 @@ import java.io.File;
 public class TestDatabaseConfig implements DatabaseConfig {
 
 	private final File dbDir, keyDir;
-	private final long maxSize;
 
-	public TestDatabaseConfig(File testDir, long maxSize) {
+	public TestDatabaseConfig(File testDir) {
 		dbDir = new File(testDir, "db");
 		keyDir = new File(testDir, "key");
-		this.maxSize = maxSize;
 	}
 
 	@Override
@@ -26,9 +24,4 @@ public class TestDatabaseConfig implements DatabaseConfig {
 	public File getDatabaseKeyDirectory() {
 		return keyDir;
 	}
-
-	@Override
-	public long getMaxSize() {
-		return maxSize;
-	}
 }

bramble-core/src/test/java/org/briarproject/bramble/test/TestDatabaseModule.java

@@ -21,7 +21,7 @@ public class TestDatabaseModule {
 	}
 
 	public TestDatabaseModule(File dir) {
-		config = new TestDatabaseConfig(dir, Long.MAX_VALUE);
+		config = new TestDatabaseConfig(dir);
 	}
 
 	@Provides

briar-android/src/main/java/org/briarproject/briar/android/AndroidDatabaseConfig.java

@@ -24,9 +24,4 @@ class AndroidDatabaseConfig implements DatabaseConfig {
 	public File getDatabaseKeyDirectory() {
 		return keyDir;
 	}
-
-	@Override
-	public long getMaxSize() {
-		return Long.MAX_VALUE;
-	}
 }

briar-headless/src/main/java/org/briarproject/briar/headless/HeadlessDatabaseConfig.kt

@@ -2,7 +2,6 @@ package org.briarproject.briar.headless
 
 import org.briarproject.bramble.api.db.DatabaseConfig
 import java.io.File
-import java.lang.Long.MAX_VALUE
 
 internal class HeadlessDatabaseConfig(private val dbDir: File, private val keyDir: File) :
     DatabaseConfig {
@@ -14,8 +13,4 @@ internal class HeadlessDatabaseConfig(private val dbDir: File, private val keyDi
     override fun getDatabaseKeyDirectory(): File {
         return keyDir
     }
-
-    override fun getMaxSize(): Long {
-        return MAX_VALUE
-    }
 }