/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.avro.tool;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.io.File;
import java.net.URI;
import java.util.List;
import joptsimple.OptionParser;
import joptsimple.OptionSet;
import joptsimple.OptionSpec;
import org.apache.avro.Protocol;
import org.apache.avro.Schema;
import org.apache.avro.Protocol.Message;
import org.apache.avro.generic.GenericDatumWriter;
import org.apache.avro.generic.GenericRequestor;
import org.apache.avro.io.DatumWriter;
import org.apache.avro.io.JsonEncoder;
import org.apache.avro.ipc.HttpTransceiver;
import org.codehaus.jackson.JsonEncoding;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonGenerator;
/**
* Sends a single RPC message.
*/
public class RpcSendTool implements Tool {
@Override
public String getName() {
return "rpcsend";
}
@Override
public String getShortDescription() {
return "Sends a single RPC message.";
}
@Override
public int run(InputStream in, PrintStream out, PrintStream err,
List<String> args) throws Exception {
OptionParser p = new OptionParser();
OptionSpec<String> file =
p.accepts("file", "Data file containing request parameters.")
.withRequiredArg()
.ofType(String.class);
OptionSpec<String> data =
p.accepts("data", "JSON-encoded request parameters.")
.withRequiredArg()
.ofType(String.class);
OptionSet opts = p.parse(args.toArray(new String[0]));
args = opts.nonOptionArguments();
if (args.size() != 3) {
err.println("Usage: uri protocol_file message_name (-data d | -file f)");
p.printHelpOn(err);
return 1;
}
URI uri = new URI(args.get(0));
Protocol protocol = Protocol.parse(new File(args.get(1)));
String messageName = args.get(2);
Message message = protocol.getMessages().get(messageName);
if (message == null) {
err.println(String.format("No message named '%s' found in protocol '%s'.",
messageName, protocol));
return 1;
}
Object datum;
if (data.value(opts) != null) {
datum = Util.jsonToGenericDatum(message.getRequest(), data.value(opts));
} else if (file.value(opts) != null) {
datum = Util.datumFromFile(message.getRequest(), file.value(opts));
} else {
err.println("One of -data or -file must be specified.");
return 1;
}
GenericRequestor client = makeClient(protocol, uri);
Object response = client.request(message.getName(), datum);
dumpJson(out, message.getResponse(), response);
return 0;
}
private void dumpJson(PrintStream out, Schema schema, Object datum)
throws IOException {
DatumWriter<Object> writer = new GenericDatumWriter<Object>(schema);
JsonGenerator g =
new JsonFactory().createJsonGenerator(out, JsonEncoding.UTF8);
g.useDefaultPrettyPrinter();
writer.write(datum, new JsonEncoder(schema, g));
g.flush();
out.println();
out.flush();
}
private GenericRequestor makeClient(Protocol protocol, URI uri)
throws IOException {
HttpTransceiver transceiver =
new HttpTransceiver(uri.toURL());
GenericRequestor requestor = new GenericRequestor(protocol, transceiver);
return requestor;
}
}