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[H2-1975] Add a TCP_CONNECTIONS table to the INFORMATION_SCHEMA #1990

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[H2-1975] Add a TCP_CONNECTIONS table to the INFORMATION_SCHEMA #1990

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9 changes: 9 additions & 0 deletions h2/src/main/org/h2/server/TcpServer.java
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,9 @@
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
Expand Down Expand Up @@ -520,4 +522,11 @@ public boolean isDaemon() {
return isDaemon;
}

public static Map<Integer, TcpServer> listTcpServers() {
return new HashMap<>(SERVERS);
}

public Set<TcpServerThread> listThreads() {
return new HashSet<TcpServerThread>(running);
}
}
16 changes: 16 additions & 0 deletions h2/src/main/org/h2/server/TcpServerThread.java
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Expand Up @@ -589,6 +589,22 @@ Thread getThread() {
return thread;
}

public Transfer getTransfer() {
return this.transfer;
}

public Integer getSessionId() {
return (this.session != null ? this.session.getId() : null);
}

public String getTcpSessionId() {
return this.sessionId;
}

public int getThreadId() {
return this.threadId;
}

/**
* Cancel a running statement.
*
Expand Down
74 changes: 73 additions & 1 deletion h2/src/main/org/h2/table/MetaTable.java
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,8 @@
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.Socket;
import java.net.SocketException;
import java.sql.DatabaseMetaData;
import java.sql.ResultSet;
import java.sql.Types;
Expand All @@ -17,6 +19,7 @@
import java.util.Collections;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

import org.h2.command.Command;
import org.h2.constraint.Constraint;
Expand Down Expand Up @@ -54,6 +57,8 @@
import org.h2.schema.SchemaObject;
import org.h2.schema.Sequence;
import org.h2.schema.TriggerObject;
import org.h2.server.TcpServer;
import org.h2.server.TcpServerThread;
import org.h2.store.InDoubtTransaction;
import org.h2.tools.Csv;
import org.h2.util.DateTimeUtils;
Expand Down Expand Up @@ -117,7 +122,8 @@ public class MetaTable extends Table {
private static final int TABLE_CONSTRAINTS = 30;
private static final int KEY_COLUMN_USAGE = 31;
private static final int REFERENTIAL_CONSTRAINTS = 32;
private static final int META_TABLE_TYPE_COUNT = REFERENTIAL_CONSTRAINTS + 1;
private static final int TCP_CONNECTIONS = 33;
private static final int META_TABLE_TYPE_COUNT = TCP_CONNECTIONS + 1;

private final int type;
private final int indexColumn;
Expand Down Expand Up @@ -621,6 +627,26 @@ public MetaTable(Schema schema, int id, int type) {
);
break;
}
case TCP_CONNECTIONS: {
setMetaTableName("TCP_CONNECTIONS");
cols = createColumns(
"TCP_SESSION_ID",
"SESSION_ID",
"THREAD_ID",
"REMOTE_IP_ADDRESS",
"REMOTE_PORT",
"LOCAL_IP_ADDRESS",
"LOCAL_PORT",
"RECV_BUFFER_SIZE",
"SEND_BUFFER_SIZE",
"KEEP_ALIVE",
"SO_TIMEOUT",
"SO_LINGER",
"TCP_NO_DELAY",
"IS_CLOSED"
);
break;
}
default:
throw DbException.throwInternalError("type="+type);
}
Expand Down Expand Up @@ -2152,6 +2178,52 @@ public ArrayList<Row> generateRows(Session session, SearchRow first,
}
break;
}
case TCP_CONNECTIONS: {
Map<Integer, TcpServer> tcpServers = TcpServer.listTcpServers();
for(Map.Entry<Integer, TcpServer> tcpServerEntry : tcpServers.entrySet()) {
for(TcpServerThread tcpServerThread : tcpServerEntry.getValue().listThreads()) {
if(tcpServerThread.getTransfer() == null || tcpServerThread.getTransfer().getSocket() == null) {
continue;
}
Socket socket = tcpServerThread.getTransfer().getSocket();

Integer soTimeoutValue = null;
try { soTimeoutValue = socket.getSoTimeout(); } catch (SocketException e) {}

Integer sendBufferSizeValue = null;
try { sendBufferSizeValue = socket.getSendBufferSize(); } catch (SocketException e) {}

Integer recvBufferSizeValue = null;
try { recvBufferSizeValue = socket.getSendBufferSize(); } catch (SocketException e) {}

Boolean keepAliveValue = null;
try { keepAliveValue = socket.getKeepAlive(); } catch (SocketException e) {}

Integer soLingerValue = null;
try { soLingerValue = socket.getSoLinger(); } catch (SocketException e) {}

Boolean tcpNoDelayValue = null;
try { tcpNoDelayValue = socket.getTcpNoDelay(); } catch (SocketException e) {}

add(rows,
tcpServerThread.getTcpSessionId(),
ValueInt.get(tcpServerThread.getSessionId()),
ValueInt.get(tcpServerThread.getThreadId()),
(socket.getInetAddress() != null ? socket.getInetAddress().toString().replace("/","") : null),
ValueInt.get(socket.getPort()),
(socket.getLocalAddress() != null ? socket.getLocalAddress().toString().replace("/","") : null),
ValueInt.get(socket.getLocalPort()),
ValueInt.get(recvBufferSizeValue),
ValueInt.get(sendBufferSizeValue),
ValueBoolean.get(keepAliveValue),
ValueInt.get(soTimeoutValue),
ValueInt.get(soLingerValue),
ValueBoolean.get(tcpNoDelayValue),
ValueBoolean.get(socket.isClosed()));
}
}
break;
}
default:
DbException.throwInternalError("type="+type);
}
Expand Down