/*
* Copyright 2004-2014 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.message;
import java.text.MessageFormat;
import java.util.ArrayList;
import org.h2.engine.SysProperties;
import org.h2.expression.ParameterInterface;
import org.h2.util.StatementBuilder;
import org.h2.util.StringUtils;
import org.h2.value.Value;
/**
* This class represents a trace module.
*/
public class Trace {
/**
* The trace module id for commands.
*/
public static final int COMMAND = 0;
/**
* The trace module id for constraints.
*/
public static final int CONSTRAINT = 1;
/**
* The trace module id for databases.
*/
public static final int DATABASE = 2;
/**
* The trace module id for functions.
*/
public static final int FUNCTION = 3;
/**
* The trace module id for file locks.
*/
public static final int FILE_LOCK = 4;
/**
* The trace module id for indexes.
*/
public static final int INDEX = 5;
/**
* The trace module id for the JDBC API.
*/
public static final int JDBC = 6;
/**
* The trace module id for locks.
*/
public static final int LOCK = 7;
/**
* The trace module id for schemas.
*/
public static final int SCHEMA = 8;
/**
* The trace module id for sequences.
*/
public static final int SEQUENCE = 9;
/**
* The trace module id for settings.
*/
public static final int SETTING = 10;
/**
* The trace module id for tables.
*/
public static final int TABLE = 11;
/**
* The trace module id for triggers.
*/
public static final int TRIGGER = 12;
/**
* The trace module id for users.
*/
public static final int USER = 13;
/**
* The trace module id for the page store.
*/
public static final int PAGE_STORE = 14;
/**
* The trace module id for the JDBCX API
*/
public static final int JDBCX = 15;
/**
* Module names by their ids as array indexes.
*/
public static final String[] MODULE_NAMES = {
"command",
"constraint",
"database",
"function",
"fileLock",
"index",
"jdbc",
"lock",
"schema",
"sequence",
"setting",
"table",
"trigger",
"user",
"pageStore",
"JDBCX"
};
private final TraceWriter traceWriter;
private final String module;
private final String lineSeparator;
private int traceLevel = TraceSystem.PARENT;
Trace(TraceWriter traceWriter, int moduleId) {
this(traceWriter, MODULE_NAMES[moduleId]);
}
Trace(TraceWriter traceWriter, String module) {
this.traceWriter = traceWriter;
this.module = module;
this.lineSeparator = SysProperties.LINE_SEPARATOR;
}
/**
* Set the trace level of this component. This setting overrides the parent
* trace level.
*
* @param level the new level
*/
public void setLevel(int level) {
this.traceLevel = level;
}
private boolean isEnabled(int level) {
if (this.traceLevel == TraceSystem.PARENT) {
return traceWriter.isEnabled(level);
}
return level <= this.traceLevel;
}
/**
* Check if the trace level is equal or higher than INFO.
*
* @return true if it is
*/
public boolean isInfoEnabled() {
return isEnabled(TraceSystem.INFO);
}
/**
* Check if the trace level is equal or higher than DEBUG.
*
* @return true if it is
*/
public boolean isDebugEnabled() {
return isEnabled(TraceSystem.DEBUG);
}
/**
* Write a message with trace level ERROR to the trace system.
*
* @param t the exception
* @param s the message
*/
public void error(Throwable t, String s) {
if (isEnabled(TraceSystem.ERROR)) {
traceWriter.write(TraceSystem.ERROR, module, s, t);
}
}
/**
* Write a message with trace level ERROR to the trace system.
*
* @param t the exception
* @param s the message
* @param params the parameters
*/
public void error(Throwable t, String s, Object... params) {
if (isEnabled(TraceSystem.ERROR)) {
s = MessageFormat.format(s, params);
traceWriter.write(TraceSystem.ERROR, module, s, t);
}
}
/**
* Write a message with trace level INFO to the trace system.
*
* @param s the message
*/
public void info(String s) {
if (isEnabled(TraceSystem.INFO)) {
traceWriter.write(TraceSystem.INFO, module, s, null);
}
}
/**
* Write a message with trace level INFO to the trace system.
*
* @param s the message
* @param params the parameters
*/
public void info(String s, Object... params) {
if (isEnabled(TraceSystem.INFO)) {
s = MessageFormat.format(s, params);
traceWriter.write(TraceSystem.INFO, module, s, null);
}
}
/**
* Write a message with trace level INFO to the trace system.
*
* @param t the exception
* @param s the message
*/
void info(Throwable t, String s) {
if (isEnabled(TraceSystem.INFO)) {
traceWriter.write(TraceSystem.INFO, module, s, t);
}
}
/**
* Format the parameter list.
*
* @param parameters the parameter list
* @return the formatted text
*/
public static String formatParams(
ArrayList<? extends ParameterInterface> parameters) {
if (parameters.size() == 0) {
return "";
}
StatementBuilder buff = new StatementBuilder();
int i = 0;
boolean params = false;
for (ParameterInterface p : parameters) {
if (p.isValueSet()) {
if (!params) {
buff.append(" {");
params = true;
}
buff.appendExceptFirst(", ");
Value v = p.getParamValue();
buff.append(++i).append(": ").append(v.getTraceSQL());
}
}
if (params) {
buff.append('}');
}
return buff.toString();
}
/**
* Write a SQL statement with trace level INFO to the trace system.
*
* @param sql the SQL statement
* @param params the parameters used, in the for {1:...}
* @param count the update count
* @param time the time it took to run the statement in ms
*/
public void infoSQL(String sql, String params, int count, long time) {
if (!isEnabled(TraceSystem.INFO)) {
return;
}
StringBuilder buff = new StringBuilder(sql.length() + params.length() + 20);
buff.append(lineSeparator).append("/*SQL");
boolean space = false;
if (params.length() > 0) {
// This looks like a bug, but it is intentional:
// If there are no parameters, the SQL statement is
// the rest of the line. If there are parameters, they
// are appended at the end of the line. Knowing the size
// of the statement simplifies separating the SQL statement
// from the parameters (no need to parse).
space = true;
buff.append(" l:").append(sql.length());
}
if (count > 0) {
space = true;
buff.append(" #:").append(count);
}
if (time > 0) {
space = true;
buff.append(" t:").append(time);
}
if (!space) {
buff.append(' ');
}
buff.append("*/").
append(StringUtils.javaEncode(sql)).
append(StringUtils.javaEncode(params)).
append(';');
sql = buff.toString();
traceWriter.write(TraceSystem.INFO, module, sql, null);
}
/**
* Write a message with trace level DEBUG to the trace system.
*
* @param s the message
* @param params the parameters
*/
public void debug(String s, Object... params) {
if (isEnabled(TraceSystem.DEBUG)) {
s = MessageFormat.format(s, params);
traceWriter.write(TraceSystem.DEBUG, module, s, null);
}
}
/**
* Write a message with trace level DEBUG to the trace system.
*
* @param s the message
*/
public void debug(String s) {
if (isEnabled(TraceSystem.DEBUG)) {
traceWriter.write(TraceSystem.DEBUG, module, s, null);
}
}
/**
* Write a message with trace level DEBUG to the trace system.
* @param t the exception
* @param s the message
*/
public void debug(Throwable t, String s) {
if (isEnabled(TraceSystem.DEBUG)) {
traceWriter.write(TraceSystem.DEBUG, module, s, t);
}
}
/**
* Write Java source code with trace level INFO to the trace system.
*
* @param java the source code
*/
public void infoCode(String java) {
if (isEnabled(TraceSystem.INFO)) {
traceWriter.write(TraceSystem.INFO, module, lineSeparator +
"/**/" + java, null);
}
}
/**
* Write Java source code with trace level DEBUG to the trace system.
*
* @param java the source code
*/
void debugCode(String java) {
if (isEnabled(TraceSystem.DEBUG)) {
traceWriter.write(TraceSystem.DEBUG, module, lineSeparator +
"/**/" + java, null);
}
}
}