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216 lines (203 loc) · 6.36 KB
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package com.almworks.sqlite4java;
import java.io.File;
import java.util.concurrent.Semaphore;
public class BusyTests extends SQLiteConnectionFixture {
private SQLiteConnection myReader;
private SQLiteConnection myWriter;
private String myFailure;
protected void setUp() throws Exception {
super.setUp();
File dbfile = dbFile();
assertFalse(dbfile.exists());
myReader = new SQLiteConnection(dbfile);
myWriter = new SQLiteConnection(dbfile);
myReader.open().exec("pragma cache_size=5").exec("pragma page_size=1024");
myReader.exec("create table x (x)").exec("insert into x values (1)");
myFailure = null;
}
protected void tearDown() throws Exception {
myReader.dispose();
myReader = null;
myWriter = null;
super.tearDown();
if (myFailure != null)
fail(myFailure);
}
public void testReadLockTransactionFails() throws SQLiteException, InterruptedException {
SQLiteStatement st = myReader.prepare("select * from x");
st.step();
assertTrue(st.hasRow());
Thread t = new Thread() {
public void run() {
try {
myWriter.open();
myWriter.exec("begin immediate");
myWriter.exec("insert into x values (2)");
try {
myWriter.exec("commit");
myFailure = "successfully committed";
} catch (SQLiteBusyException e) {
e.printStackTrace();
if (myWriter.getAutoCommit())
myFailure = "transaction rolled back";
}
} catch (SQLiteException e) {
e.printStackTrace();
myFailure = String.valueOf(e);
} finally {
myWriter.dispose();
}
}
};
t.start();
t.join();
}
public void testReadLockTransactionFailsWithTimeout() throws SQLiteException, InterruptedException {
SQLiteStatement st = myReader.prepare("select * from x");
st.step();
assertTrue(st.hasRow());
Thread t = new Thread() {
public void run() {
try {
myWriter.open();
int timeout = 2000;
myWriter.setBusyTimeout(timeout);
myWriter.exec("begin immediate");
myWriter.exec("insert into x values (2)");
long t1 = System.currentTimeMillis();
try {
myWriter.exec("commit");
myFailure = "successfully committed";
} catch (SQLiteBusyException e) {
long t2 = System.currentTimeMillis();
assertTrue(String.valueOf(t2 - t1), t2 - t1 > timeout - 100);
e.printStackTrace();
if (myWriter.getAutoCommit())
myFailure = "transaction rolled back";
}
} catch (SQLiteException e) {
e.printStackTrace();
myFailure = String.valueOf(e);
} finally {
myWriter.dispose();
}
}
};
t.start();
t.join();
}
public void testReadLockTransactionWaits() throws SQLiteException, InterruptedException {
final int timeout = 2000;
SQLiteStatement st = myReader.prepare("select * from x");
st.step();
assertTrue(st.hasRow());
final Semaphore s = new Semaphore(1);
s.acquire();
Thread t = new Thread() {
public void run() {
try {
myWriter.open();
myWriter.setBusyTimeout(timeout);
myWriter.exec("begin immediate");
myWriter.exec("insert into x values (2)");
s.release();
long t1 = System.currentTimeMillis();
myWriter.exec("commit");
long t2 = System.currentTimeMillis();
System.out.println("commit waited for " + (t2 - t1));
} catch (SQLiteException e) {
e.printStackTrace();
myFailure = String.valueOf(e);
} finally {
myWriter.dispose();
}
}
};
t.start();
s.acquire();
s.release();
Thread.sleep(timeout / 2);
st.reset();
t.join();
}
public void testBusySpillPre36() throws SQLiteException, InterruptedException {
if (SQLite.getSQLiteVersionNumber() >= 3006000) {
// skipping
return;
}
SQLiteStatement st = myReader.prepare("select * from x");
st.step();
assertTrue(st.hasRow());
Thread t = new Thread() {
public void run() {
try {
myWriter.open().exec("pragma cache_size=5");
myWriter.exec("begin immediate");
SQLiteStatement st = myWriter.prepare("insert into x values (?)");
try {
for (int i = 0; i < 20; i++) {
st.bind(1, garbageString(512));
st.step();
st.reset();
}
myFailure = "successfully inserted data in one transaction that exceeds disk cache and shared lock is preserved";
} catch (SQLiteBusyException e) {
if (!myWriter.getAutoCommit())
myFailure = "transaction not rolled back";
} finally {
st.dispose();
}
} catch (SQLiteException e) {
e.printStackTrace();
myFailure = String.valueOf(e);
} finally {
myWriter.dispose();
}
}
};
t.start();
t.join();
}
public void testBusySpillPost36() throws SQLiteException, InterruptedException {
if (SQLite.getSQLiteVersionNumber() < 3006000) {
// skipping
return;
}
SQLiteStatement st = myReader.prepare("select * from x");
st.step();
assertTrue(st.hasRow());
Thread t = new Thread() {
public void run() {
try {
myWriter.open().exec("pragma cache_size=5");
myWriter.exec("begin immediate");
SQLiteStatement st = myWriter.prepare("insert into x values (?)");
try {
myFailure = "couldn't insert data";
for (int i = 0; i < 20; i++) {
st.bind(1, garbageString(512));
st.step();
st.reset();
}
// should get here
myFailure = "commit didn't throw busy exception";
myWriter.exec("commit");
} catch (SQLiteBusyException e) {
if (myWriter.getAutoCommit())
myFailure = "transaction rolled back";
myFailure = null;
} finally {
st.dispose();
}
} catch (SQLiteException e) {
e.printStackTrace();
myFailure = String.valueOf(e);
} finally {
myWriter.dispose();
}
}
};
t.start();
t.join();
}
}