author | iris |
Thu, 21 Jul 2016 07:43:17 -0700 | |
changeset 39809 | 74b7aea686d8 |
parent 39807 | ba0ff343d241 |
child 40764 | 29ded021f809 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package jdk.jshell.execution; |
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|
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import java.io.File; |
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import java.util.ArrayList; |
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import java.util.HashMap; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.Map.Entry; |
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import com.sun.jdi.Bootstrap; |
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import com.sun.jdi.VirtualMachine; |
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import com.sun.jdi.connect.Connector; |
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import com.sun.jdi.connect.LaunchingConnector; |
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import com.sun.jdi.connect.ListeningConnector; |
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|
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/** |
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* Sets up a JDI connection, providing the resulting JDI {@link VirtualMachine} |
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* and the {@link Process} the remote agent is running in. |
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*/ |
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public class JDIInitiator { |
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private VirtualMachine vm; |
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private Process process = null; |
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private final Connector connector; |
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private final String remoteAgent; |
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private final Map<String, com.sun.jdi.connect.Connector.Argument> connectorArgs; |
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|
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/** |
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* Start the remote agent and establish a JDI connection to it. |
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* |
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* @param port the socket port for (non-JDI) commands |
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* @param remoteVMOptions any user requested VM options |
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* @param remoteAgent full class name of remote agent to launch |
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* @param isLaunch does JDI do the launch? That is, LaunchingConnector, |
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* otherwise we start explicitly and use ListeningConnector |
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*/ |
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public JDIInitiator(int port, List<String> remoteVMOptions, |
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String remoteAgent, boolean isLaunch) { |
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this.remoteAgent = remoteAgent; |
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String connectorName |
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= isLaunch |
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? "com.sun.jdi.CommandLineLaunch" |
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: "com.sun.jdi.SocketListen"; |
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this.connector = findConnector(connectorName); |
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if (connector == null) { |
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throw new IllegalArgumentException("No connector named: " + connectorName); |
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} |
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Map<String, String> argumentName2Value |
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= isLaunch |
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? launchArgs(port, String.join(" ", remoteVMOptions)) |
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: new HashMap<>(); |
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this.connectorArgs = mergeConnectorArgs(connector, argumentName2Value); |
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this.vm = isLaunch |
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? launchTarget() |
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: listenTarget(port, remoteVMOptions); |
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} |
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/** |
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* Returns the resulting {@code VirtualMachine} instance. |
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* |
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* @return the virtual machine |
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*/ |
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public VirtualMachine vm() { |
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return vm; |
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} |
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/** |
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* Returns the launched process. |
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* |
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* @return the remote agent process |
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*/ |
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public Process process() { |
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return process; |
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} |
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/* launch child target vm */ |
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private VirtualMachine launchTarget() { |
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LaunchingConnector launcher = (LaunchingConnector) connector; |
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try { |
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VirtualMachine new_vm = launcher.launch(connectorArgs); |
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process = new_vm.process(); |
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return new_vm; |
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} catch (Exception ex) { |
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reportLaunchFail(ex, "launch"); |
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} |
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return null; |
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} |
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|
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/** |
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* Directly launch the remote agent and connect JDI to it with a |
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* ListeningConnector. |
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*/ |
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private VirtualMachine listenTarget(int port, List<String> remoteVMOptions) { |
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ListeningConnector listener = (ListeningConnector) connector; |
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try { |
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// Start listening, get the JDI connection address |
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String addr = listener.startListening(connectorArgs); |
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debug("Listening at address: " + addr); |
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|
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// Launch the RemoteAgent requesting a connection on that address |
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String javaHome = System.getProperty("java.home"); |
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List<String> args = new ArrayList<>(); |
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args.add(javaHome == null |
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? "java" |
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: javaHome + File.separator + "bin" + File.separator + "java"); |
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args.add("-agentlib:jdwp=transport=" + connector.transport().name() + |
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",address=" + addr); |
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args.addAll(remoteVMOptions); |
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args.add(remoteAgent); |
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args.add("" + port); |
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135 |
ProcessBuilder pb = new ProcessBuilder(args); |
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process = pb.start(); |
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137 |
|
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138 |
// Forward out, err, and in |
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139 |
// Accept the connection from the remote agent |
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vm = listener.accept(connectorArgs); |
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141 |
listener.stopListening(connectorArgs); |
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return vm; |
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} catch (Exception ex) { |
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reportLaunchFail(ex, "listen"); |
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145 |
} |
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146 |
return null; |
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147 |
} |
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148 |
|
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149 |
private Connector findConnector(String name) { |
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for (Connector cntor |
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: Bootstrap.virtualMachineManager().allConnectors()) { |
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if (cntor.name().equals(name)) { |
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return cntor; |
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154 |
} |
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155 |
} |
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156 |
return null; |
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157 |
} |
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158 |
|
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private Map<String, Connector.Argument> mergeConnectorArgs(Connector connector, Map<String, String> argumentName2Value) { |
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Map<String, Connector.Argument> arguments = connector.defaultArguments(); |
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161 |
|
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162 |
for (Entry<String, String> argumentEntry : argumentName2Value.entrySet()) { |
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String name = argumentEntry.getKey(); |
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String value = argumentEntry.getValue(); |
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Connector.Argument argument = arguments.get(name); |
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166 |
|
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if (argument == null) { |
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throw new IllegalArgumentException("Argument is not defined for connector:" + |
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name + " -- " + connector.name()); |
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170 |
} |
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171 |
|
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argument.setValue(value); |
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173 |
} |
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174 |
|
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175 |
return arguments; |
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176 |
} |
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177 |
|
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178 |
/** |
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* The JShell specific Connector args for the LaunchingConnector. |
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* |
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* @param portthe socket port for (non-JDI) commands |
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* @param remoteVMOptions any user requested VM options |
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183 |
* @return the argument map |
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184 |
*/ |
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185 |
private Map<String, String> launchArgs(int port, String remoteVMOptions) { |
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186 |
Map<String, String> argumentName2Value = new HashMap<>(); |
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187 |
argumentName2Value.put("main", remoteAgent + " " + port); |
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argumentName2Value.put("options", remoteVMOptions); |
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189 |
return argumentName2Value; |
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190 |
} |
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191 |
|
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192 |
private void reportLaunchFail(Exception ex, String context) { |
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193 |
throw new InternalError("Failed remote " + context + ": " + connector + |
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194 |
" -- " + connectorArgs, ex); |
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195 |
} |
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196 |
|
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197 |
/** |
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198 |
* Log debugging information. Arguments as for {@code printf}. |
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199 |
* |
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200 |
* @param format a format string as described in Format string syntax |
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201 |
* @param args arguments referenced by the format specifiers in the format |
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202 |
* string. |
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203 |
*/ |
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204 |
private void debug(String format, Object... args) { |
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205 |
// Reserved for future logging |
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206 |
} |
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207 |
|
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208 |
/** |
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209 |
* Log a serious unexpected internal exception. |
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210 |
* |
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211 |
* @param ex the exception |
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212 |
* @param where a description of the context of the exception |
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213 |
*/ |
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214 |
private void debug(Throwable ex, String where) { |
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215 |
// Reserved for future logging |
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216 |
} |
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217 |
|
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218 |
} |