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Created an improved JdbcNodeRegistry and removed MemoryNodeRegistry, as it doesn't properly work with the way nodes are handled and disseminated in the new PyBitmessage client. The new one should work a lot more stable.

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This commit is contained in:
Christian Basler 2016-09-01 07:35:46 +02:00
parent 827973f642
commit dad05d835b
9 changed files with 267 additions and 248 deletions
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125
core/src/main/java/ch/dissem/bitmessage/ports/MemoryNodeRegistry.java
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@ -1,125 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.ports;
import ch.dissem.bitmessage.entity.valueobject.NetworkAddress;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.utils.UnixTime;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetAddress;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
import static ch.dissem.bitmessage.utils.Collections.selectRandom;
import static ch.dissem.bitmessage.utils.UnixTime.HOUR;
import static java.util.Collections.newSetFromMap;
public class MemoryNodeRegistry implements NodeRegistry {
private static final Logger LOG = LoggerFactory.getLogger(MemoryNodeRegistry.class);
private final Map<Long, Set<NetworkAddress>> stableNodes = new ConcurrentHashMap<>();
private final Map<Long, Set<NetworkAddress>> knownNodes = new ConcurrentHashMap<>();
private void loadStableNodes() {
try (InputStream in = getClass().getClassLoader().getResourceAsStream("nodes.txt")) {
Scanner scanner = new Scanner(in);
long stream = 0;
Set<NetworkAddress> streamSet = null;
while (scanner.hasNext()) {
try {
String line = scanner.nextLine().trim();
if (line.startsWith("[stream")) {
stream = Long.parseLong(line.substring(8, line.lastIndexOf(']')));
streamSet = new HashSet<>();
stableNodes.put(stream, streamSet);
} else if (streamSet != null && !line.isEmpty() && !line.startsWith("#")) {
int portIndex = line.lastIndexOf(':');
InetAddress[] inetAddresses = InetAddress.getAllByName(line.substring(0, portIndex));
int port = Integer.valueOf(line.substring(portIndex + 1));
for (InetAddress inetAddress : inetAddresses) {
streamSet.add(new NetworkAddress.Builder().ip(inetAddress).port(port).stream(stream).build());
}
}
} catch (IOException e) {
LOG.warn(e.getMessage(), e);
}
}
if (LOG.isDebugEnabled()) {
for (Map.Entry<Long, Set<NetworkAddress>> e : stableNodes.entrySet()) {
LOG.debug("Stream " + e.getKey() + ": loaded " + e.getValue().size() + " bootstrap nodes.");
}
}
} catch (IOException e) {
throw new ApplicationException(e);
}
}
@Override
public List<NetworkAddress> getKnownAddresses(int limit, long... streams) {
List<NetworkAddress> result = new LinkedList<>();
for (long stream : streams) {
Set<NetworkAddress> known = knownNodes.get(stream);
if (known != null && !known.isEmpty()) {
for (NetworkAddress node : known) {
if (node.getTime() > UnixTime.now(-3 * HOUR)) {
result.add(node);
} else {
known.remove(node);
}
}
}
if (result.isEmpty()) {
if (stableNodes.isEmpty() || stableNodes.get(stream).isEmpty()) {
loadStableNodes();
}
Set<NetworkAddress> nodes = stableNodes.get(stream);
if (nodes != null && !nodes.isEmpty()) {
// To reduce load on stable nodes, only return one
result.add(selectRandom(nodes));
}
}
}
return selectRandom(limit, result);
}
@Override
public void offerAddresses(List<NetworkAddress> addresses) {
for (NetworkAddress node : addresses) {
if (node.getTime() <= UnixTime.now()) {
if (!knownNodes.containsKey(node.getStream())) {
synchronized (knownNodes) {
if (!knownNodes.containsKey(node.getStream())) {
knownNodes.put(
node.getStream(),
newSetFromMap(new ConcurrentHashMap<NetworkAddress, Boolean>())
);
}
}
}
if (node.getTime() <= UnixTime.now()) {
// TODO: This isn't quite correct
// If the node is already known, the one with the more recent time should be used
knownNodes.get(node.getStream()).add(node);
}
}
}
}
}

54
core/src/main/java/ch/dissem/bitmessage/ports/NodeRegistryHelper.java Normal file
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@ -0,0 +1,54 @@
package ch.dissem.bitmessage.ports;
import ch.dissem.bitmessage.entity.valueobject.NetworkAddress;
import ch.dissem.bitmessage.exception.ApplicationException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetAddress;
import java.util.*;
/**
* Helper class to kick start node registries.
*/
public class NodeRegistryHelper {
private static final Logger LOG = LoggerFactory.getLogger(NodeRegistryHelper.class);
public static Map<Long, Set<NetworkAddress>> loadStableNodes() {
try (InputStream in = NodeRegistryHelper.class.getClassLoader().getResourceAsStream("nodes.txt")) {
Scanner scanner = new Scanner(in);
long stream = 0;
Map<Long, Set<NetworkAddress>> result = new HashMap<>();
Set<NetworkAddress> streamSet = null;
while (scanner.hasNext()) {
try {
String line = scanner.nextLine().trim();
if (line.startsWith("[stream")) {
stream = Long.parseLong(line.substring(8, line.lastIndexOf(']')));
streamSet = new HashSet<>();
result.put(stream, streamSet);
} else if (streamSet != null && !line.isEmpty() && !line.startsWith("#")) {
int portIndex = line.lastIndexOf(':');
InetAddress[] inetAddresses = InetAddress.getAllByName(line.substring(0, portIndex));
int port = Integer.valueOf(line.substring(portIndex + 1));
for (InetAddress inetAddress : inetAddresses) {
streamSet.add(new NetworkAddress.Builder().ip(inetAddress).port(port).stream(stream).build());
}
}
} catch (IOException e) {
LOG.warn(e.getMessage(), e);
}
}
if (LOG.isDebugEnabled()) {
for (Map.Entry<Long, Set<NetworkAddress>> e : result.entrySet()) {
LOG.debug("Stream " + e.getKey() + ": loaded " + e.getValue().size() + " bootstrap nodes.");
}
}
return result;
} catch (IOException e) {
throw new ApplicationException(e);
}
}
}

99
core/src/test/java/ch/dissem/bitmessage/ports/NodeRegistryTest.java
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@ -1,99 +0,0 @@
/*
* Copyright 2016 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.ports;
import ch.dissem.bitmessage.entity.valueobject.NetworkAddress;
import ch.dissem.bitmessage.utils.UnixTime;
import org.junit.Test;
import java.util.Arrays;
import static ch.dissem.bitmessage.utils.UnixTime.HOUR;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.assertThat;
public class NodeRegistryTest {
private NodeRegistry registry = new MemoryNodeRegistry();
@Test
public void ensureGetKnownNodesWithoutStreamsYieldsEmpty() {
assertThat(registry.getKnownAddresses(10), empty());
}
/**
* Please note that this test fails if there is no internet connection,
* as the initial nodes' IP addresses are determined by DNS lookup.
*/
@Test
public void ensureGetKnownNodesForStream1YieldsResult() {
assertThat(registry.getKnownAddresses(10, 1), hasSize(1));
}
@Test
public void ensureNodeIsStored() {
registry.offerAddresses(Arrays.asList(
new NetworkAddress.Builder()
.ipv4(127, 0, 0, 1)
.port(42)
.stream(1)
.time(UnixTime.now())
.build(),
new NetworkAddress.Builder()
.ipv4(127, 0, 0, 2)
.port(42)
.stream(1)
.time(UnixTime.now())
.build(),
new NetworkAddress.Builder()
.ipv4(127, 0, 0, 2)
.port(42)
.stream(2)
.time(UnixTime.now())
.build()
));
assertThat(registry.getKnownAddresses(10, 1).size(), is(2));
assertThat(registry.getKnownAddresses(10, 2).size(), is(1));
assertThat(registry.getKnownAddresses(10, 1, 2).size(), is(3));
}
@Test
public void ensureOldNodesAreRemoved() {
registry.offerAddresses(Arrays.asList(
new NetworkAddress.Builder()
.ipv4(127, 0, 0, 1)
.port(42)
.stream(1)
.time(UnixTime.now())
.build(),
new NetworkAddress.Builder()
.ipv4(127, 0, 0, 2)
.port(42)
.stream(1)
.time(UnixTime.now(-4 * HOUR))
.build(),
new NetworkAddress.Builder()
.ipv4(127, 0, 0, 2)
.port(42)
.stream(2)
.time(UnixTime.now())
.build()
));
assertThat(registry.getKnownAddresses(10, 1).size(), is(1));
assertThat(registry.getKnownAddresses(10, 2).size(), is(1));
assertThat(registry.getKnownAddresses(10, 1, 2).size(), is(2));
}
}

3
demo/src/main/java/ch/dissem/bitmessage/demo/Main.java
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@ -20,7 +20,6 @@ import ch.dissem.bitmessage.BitmessageContext;
import ch.dissem.bitmessage.cryptography.bc.BouncyCryptography;
import ch.dissem.bitmessage.entity.valueobject.NetworkAddress;
import ch.dissem.bitmessage.networking.nio.NioNetworkHandler;
import ch.dissem.bitmessage.ports.MemoryNodeRegistry;
import ch.dissem.bitmessage.ports.NodeRegistry;
import ch.dissem.bitmessage.repository.*;
import ch.dissem.bitmessage.wif.WifExporter;
@ -82,7 +81,7 @@ public class Main {
}
});
} else {
ctxBuilder.nodeRegistry(new MemoryNodeRegistry());
ctxBuilder.nodeRegistry(new JdbcNodeRegistry(jdbcConfig));
}
if (options.exportWIF != null || options.importWIF != null) {

2
networking/src/main/java/ch/dissem/bitmessage/networking/nio/ConnectionInfo.java
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@ -129,7 +129,7 @@ public class ConnectionInfo extends AbstractConnection {
}
@Override
public synchronized void disconnect() {
public void disconnect() {
super.disconnect();
if (reader != null) {
reader.cleanup();

8
networking/src/main/java/ch/dissem/bitmessage/networking/nio/NioNetworkHandler.java
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@ -26,7 +26,7 @@ import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.exception.NodeException;
import ch.dissem.bitmessage.factory.V3MessageReader;
import ch.dissem.bitmessage.ports.NetworkHandler;
import ch.dissem.bitmessage.utils.Property;
import ch.dissem.bitmessage.utils.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@ -37,6 +37,7 @@ import java.net.NoRouteToHostException;
import java.nio.ByteBuffer;
import java.nio.channels.*;
import java.util.*;
import java.util.Collections;
import java.util.concurrent.*;
import static ch.dissem.bitmessage.networking.AbstractConnection.Mode.*;
@ -193,7 +194,8 @@ public class NioNetworkHandler implements NetworkHandler, InternalContext.Contex
}
}
if (missing > 0) {
List<NetworkAddress> addresses = ctx.getNodeRegistry().getKnownAddresses(missing, ctx.getStreams());
List<NetworkAddress> addresses = ctx.getNodeRegistry().getKnownAddresses(100, ctx.getStreams());
addresses = selectRandom(missing, addresses);
for (NetworkAddress address : addresses) {
if (isConnectedTo(address)) {
continue;
@ -389,7 +391,7 @@ public class NioNetworkHandler implements NetworkHandler, InternalContext.Contex
ConnectionInfo previous = null;
do {
for (ConnectionInfo connection : distribution.keySet()) {
if (connection == previous) {
if (connection == previous || previous == null) {
next = iterator.next();
}
if (connection.knowsOf(next)) {

167
repositories/src/main/java/ch/dissem/bitmessage/repository/JdbcNodeRegistry.java Normal file
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@ -0,0 +1,167 @@
package ch.dissem.bitmessage.repository;
import ch.dissem.bitmessage.entity.valueobject.NetworkAddress;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.ports.NodeRegistry;
import ch.dissem.bitmessage.utils.Collections;
import ch.dissem.bitmessage.utils.SqlStrings;
import ch.dissem.bitmessage.utils.Strings;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.sql.*;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import static ch.dissem.bitmessage.ports.NodeRegistryHelper.loadStableNodes;
import static ch.dissem.bitmessage.utils.UnixTime.*;
public class JdbcNodeRegistry extends JdbcHelper implements NodeRegistry {
private static final Logger LOG = LoggerFactory.getLogger(JdbcNodeRegistry.class);
private Map<Long, Set<NetworkAddress>> stableNodes;
public JdbcNodeRegistry(JdbcConfig config) {
super(config);
cleanUp();
}
private void cleanUp() {
try (
Connection connection = config.getConnection();
PreparedStatement ps = connection.prepareStatement(
"DELETE FROM Node WHERE time<?")
) {
ps.setLong(1, now(-28 * DAY));
ps.executeUpdate();
} catch (SQLException e) {
LOG.error(e.getMessage(), e);
}
}
private NetworkAddress loadExisting(NetworkAddress node) {
String query =
"SELECT stream, address, port, services, time" +
" FROM Node" +
" WHERE stream = " + node.getStream() +
" AND address = X'" + Strings.hex(node.getIPv6()) + "'" +
" AND port = " + node.getPort();
try (
Connection connection = config.getConnection();
Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery(query)
) {
if (rs.next()) {
return new NetworkAddress.Builder()
.stream(rs.getLong("stream"))
.ipv6(rs.getBytes("address"))
.port(rs.getInt("port"))
.services(rs.getLong("services"))
.time(rs.getLong("time"))
.build();
} else {
return null;
}
} catch (Exception e) {
LOG.error(e.getMessage(), e);
throw new ApplicationException(e);
}
}
@Override
public List<NetworkAddress> getKnownAddresses(int limit, long... streams) {
List<NetworkAddress> result = new LinkedList<>();
String query =
"SELECT stream, address, port, services, time" +
" FROM Node WHERE stream IN (" + SqlStrings.join(streams) + ")" +
" ORDER BY TIME DESC" +
" LIMIT " + limit;
try (
Connection connection = config.getConnection();
Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery(query)
) {
while (rs.next()) {
result.add(
new NetworkAddress.Builder()
.stream(rs.getLong("stream"))
.ipv6(rs.getBytes("address"))
.port(rs.getInt("port"))
.services(rs.getLong("services"))
.time(rs.getLong("time"))
.build()
);
}
} catch (Exception e) {
LOG.error(e.getMessage(), e);
throw new ApplicationException(e);
}
if (result.isEmpty()) {
synchronized (this) {
if (stableNodes == null) {
stableNodes = loadStableNodes();
}
}
for (long stream : streams) {
Set<NetworkAddress> nodes = stableNodes.get(stream);
if (nodes != null) {
result.add(Collections.selectRandom(nodes));
}
}
}
return result;
}
@Override
public void offerAddresses(List<NetworkAddress> nodes) {
cleanUp();
nodes.stream()
.filter(node -> node.getTime() < now(+24 * HOUR) && node.getTime() > now(-28 * DAY))
.forEach(node -> {
synchronized (this) {
NetworkAddress existing = loadExisting(node);
if (existing == null) {
insert(node);
} else if (node.getTime() > existing.getTime()) {
update(node);
}
}
});
}
private void insert(NetworkAddress node) {
try (
Connection connection = config.getConnection();
PreparedStatement ps = connection.prepareStatement(
"INSERT INTO Node (stream, address, port, services, time) " +
"VALUES (?, ?, ?, ?, ?)")
) {
ps.setLong(1, node.getStream());
ps.setBytes(2, node.getIPv6());
ps.setInt(3, node.getPort());
ps.setLong(4, node.getServices());
ps.setLong(5, node.getTime());
ps.executeUpdate();
} catch (SQLException e) {
LOG.error(e.getMessage(), e);
}
}
private void update(NetworkAddress node) {
try (
Connection connection = config.getConnection();
PreparedStatement ps = connection.prepareStatement(
"UPDATE Node SET services=?, time=? WHERE stream=? AND address=? AND port=?")
) {
ps.setLong(1, node.getServices());
ps.setLong(2, node.getTime());
ps.setLong(3, node.getStream());
ps.setBytes(4, node.getIPv6());
ps.setInt(5, node.getPort());
ps.executeUpdate();
} catch (SQLException e) {
LOG.error(e.getMessage(), e);
}
}
}

9
repositories/src/main/resources/db/migration/V3.3__Create_table_node.sql Normal file
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@ -0,0 +1,9 @@
CREATE TABLE Node (
stream BIGINT NOT NULL,
address BINARY(32) NOT NULL,
port INT NOT NULL,
services BIGINT NOT NULL,
time BIGINT NOT NULL,
PRIMARY KEY (stream, address, port)
);
CREATE INDEX idx_time on Node(time);

20
repositories/src/test/java/ch/dissem/bitmessage/repository/JdbcNodeRegistryTest.java
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@ -17,8 +17,8 @@
package ch.dissem.bitmessage.repository;
import ch.dissem.bitmessage.entity.valueobject.NetworkAddress;
import ch.dissem.bitmessage.ports.MemoryNodeRegistry;
import ch.dissem.bitmessage.ports.NodeRegistry;
import ch.dissem.bitmessage.utils.UnixTime;
import org.junit.Before;
import org.junit.Test;
@ -27,8 +27,15 @@ import java.util.Collections;
import java.util.List;
import static ch.dissem.bitmessage.utils.UnixTime.now;
import static org.hamcrest.Matchers.empty;
import static org.hamcrest.Matchers.is;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;
/**
* Please note that some tests fail if there is no internet connection,
* as the initial nodes' IP addresses are determined by DNS lookup.
*/
public class JdbcNodeRegistryTest extends TestBase {
private TestJdbcConfig config;
private NodeRegistry registry;
@ -37,7 +44,7 @@ public class JdbcNodeRegistryTest extends TestBase {
public void setUp() throws Exception {
config = new TestJdbcConfig();
config.reset();
registry = new MemoryNodeRegistry();
registry = new JdbcNodeRegistry(config);
registry.offerAddresses(Arrays.asList(
createAddress(1, 8444, 1, now()),
@ -48,10 +55,15 @@ public class JdbcNodeRegistryTest extends TestBase {
}
@Test
public void testInitNodes() throws Exception {
public void ensureGetKnownNodesWithoutStreamsYieldsEmpty() {
assertThat(registry.getKnownAddresses(10), empty());
}
@Test
public void ensurePredefinedNodeIsReturnedWhenDatabaseIsEmpty() throws Exception {
config.reset();
List<NetworkAddress> knownAddresses = registry.getKnownAddresses(2, 1);
assertEquals(2, knownAddresses.size());
assertEquals(1, knownAddresses.size());
}
@Test