InternalXmlRpcMethodCaller.java
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/*
Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
The MySQL Connector/J is licensed under the terms of the GPLv2
<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors.
There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
this software, see the FOSS License Exception
<http://www.mysql.com/about/legal/licensing/foss-exception.html>.
This program is free software; you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the Free Software Foundation; version 2
of the License.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this
program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth
Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.fabric.proto.xmlrpc;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.mysql.fabric.FabricCommunicationException;
import com.mysql.fabric.xmlrpc.Client;
import com.mysql.fabric.xmlrpc.base.Array;
import com.mysql.fabric.xmlrpc.base.Member;
import com.mysql.fabric.xmlrpc.base.MethodCall;
import com.mysql.fabric.xmlrpc.base.MethodResponse;
import com.mysql.fabric.xmlrpc.base.Param;
import com.mysql.fabric.xmlrpc.base.Params;
import com.mysql.fabric.xmlrpc.base.Struct;
import com.mysql.fabric.xmlrpc.base.Value;
/**
* An XML-RPC method caller which uses the internal XML-RPC client
* library.
*/
public class InternalXmlRpcMethodCaller implements XmlRpcMethodCaller {
private Client xmlRpcClient;
public InternalXmlRpcMethodCaller(String url) throws FabricCommunicationException {
try {
this.xmlRpcClient = new Client(url);
} catch (MalformedURLException ex) {
throw new FabricCommunicationException(ex);
}
}
/**
* Unwrap the underlying object from the Value wrapper.
*/
private Object unwrapValue(Value v) {
if (v.getType() == Value.TYPE_array) {
return methodResponseArrayToList((Array) v.getValue());
} else if (v.getType() == Value.TYPE_struct) {
Map<String, Object> s = new HashMap<String, Object>();
for (Member m : ((Struct) v.getValue()).getMember()) {
s.put(m.getName(), unwrapValue(m.getValue()));
}
return s;
}
return v.getValue();
}
private List<Object> methodResponseArrayToList(Array array) {
List<Object> result = new ArrayList<Object>();
for (Value v : array.getData().getValue()) {
result.add(unwrapValue(v));
}
return result;
}
public void setHeader(String name, String value) {
this.xmlRpcClient.setHeader(name, value);
}
public void clearHeader(String name) {
this.xmlRpcClient.clearHeader(name);
}
public List<Object> call(String methodName, Object args[]) throws FabricCommunicationException {
MethodCall methodCall = new MethodCall();
Params p = new Params();
if (args == null) {
args = new Object[] {};
}
for (int i = 0; i < args.length; ++i) {
if (args[i] == null) {
throw new NullPointerException("nil args unsupported");
} else if (String.class.isAssignableFrom(args[i].getClass())) {
p.addParam(new Param(new Value((String) args[i])));
} else if (Double.class.isAssignableFrom(args[i].getClass())) {
p.addParam(new Param(new Value((Double) args[i])));
} else if (Integer.class.isAssignableFrom(args[i].getClass())) {
p.addParam(new Param(new Value((Integer) args[i])));
} else {
throw new IllegalArgumentException("Unknown argument type: " + args[i].getClass());
}
}
methodCall.setMethodName(methodName);
methodCall.setParams(p);
try {
MethodResponse resp = this.xmlRpcClient.execute(methodCall);
return methodResponseArrayToList((Array) resp.getParams().getParam().get(0).getValue().getValue());
} catch (Exception ex) {
throw new FabricCommunicationException("Error during call to `" + methodName + "' (args=" + Arrays.toString(args) + ")", ex); //irrecoverable
}
}
}