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[FLINK-12311][python] Add base python framework and Add Scan, Project…
…ion, and Filter operator support This closes apache#8267 make travis tests green fix documents, refine shell file name and optimize program logic. Adjust the code examples in python documents to be consistent with scala documents. Refactor flink-python project structure, remove java file from flink-python package. delete unnecessary dependency and plugins.
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77 changes: 77 additions & 0 deletions
77
flink-core/src/main/java/org/apache/flink/api/python/PythonGatewayServer.java
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| @@ -0,0 +1,77 @@ | ||
| /* | ||
| * 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:https://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. | ||
| */ | ||
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| package org.apache.flink.api.python; | ||
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| import py4j.GatewayServer; | ||
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| import java.io.DataOutputStream; | ||
| import java.io.File; | ||
| import java.io.FileOutputStream; | ||
| import java.io.IOException; | ||
| import java.net.InetAddress; | ||
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| /** | ||
| * The Py4j Gateway Server provides RPC service for user's python process. | ||
| */ | ||
| public class PythonGatewayServer { | ||
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| /** | ||
| * <p> | ||
| * Main method to start a local GatewayServer on a ephemeral port. | ||
| * It tells python side via a file. | ||
| * | ||
| * See: py4j.GatewayServer.main() | ||
| * </p> | ||
| */ | ||
| public static void main(String[] args) throws IOException { | ||
| InetAddress localhost = InetAddress.getLoopbackAddress(); | ||
| GatewayServer gatewayServer = new GatewayServer.GatewayServerBuilder() | ||
| .javaPort(0) | ||
| .javaAddress(localhost) | ||
| .build(); | ||
| gatewayServer.start(); | ||
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| int boundPort = gatewayServer.getListeningPort(); | ||
| if (boundPort == -1) { | ||
| System.out.println("GatewayServer failed to bind; exiting"); | ||
| System.exit(1); | ||
| } | ||
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| // Tells python side the port of our java rpc server | ||
| String handshakeFilePath = System.getenv("_PYFLINK_CONN_INFO_PATH"); | ||
| File handshakeFile = new File(handshakeFilePath); | ||
| if (handshakeFile.createNewFile()) { | ||
| FileOutputStream fileOutputStream = new FileOutputStream(handshakeFile); | ||
| DataOutputStream stream = new DataOutputStream(fileOutputStream); | ||
| stream.writeInt(boundPort); | ||
| stream.close(); | ||
| fileOutputStream.close(); | ||
| } else { | ||
| System.out.println("Can't create handshake file: " + handshakeFilePath + ", now exit..."); | ||
| return; | ||
| } | ||
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| // Exit on EOF or broken pipe. This ensures that the server dies | ||
| // if its parent program dies. | ||
| while (System.in.read() != -1) { | ||
| // Do nothing | ||
| } | ||
| gatewayServer.shutdown(); | ||
| } | ||
| } |
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54 changes: 54 additions & 0 deletions
54
flink-dist/src/main/flink-bin/bin/pyflink-gateway-server.sh
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| #!/usr/bin/env bash | ||
| ################################################################################ | ||
| # 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:https://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. | ||
| ################################################################################ | ||
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| # ===================================================================== | ||
| bin=`dirname "$0"` | ||
| bin=`cd "$bin"; pwd` | ||
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| . "$bin"/config.sh | ||
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| if [ "$FLINK_IDENT_STRING" = "" ]; then | ||
| FLINK_IDENT_STRING="$USER" | ||
| fi | ||
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| FLINK_CLASSPATH=`constructFlinkClassPath` | ||
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| ARGS=() | ||
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| while [[ $# -gt 0 ]] | ||
| do | ||
| key="$1" | ||
| case $key in | ||
| -c|--class) | ||
| DRIVER=$2 | ||
| shift | ||
| shift | ||
| ;; | ||
| *) | ||
| ARGS+=("$1") | ||
| shift | ||
| ;; | ||
| esac | ||
| done | ||
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| log=$FLINK_LOG_DIR/flink-$FLINK_IDENT_STRING-client-$HOSTNAME.log | ||
| log_setting=(-Dlog.file="$log" -Dlog4j.configuration=file:"$FLINK_CONF_DIR"/log4j-cli.properties -Dlogback.configurationFile=file:"$FLINK_CONF_DIR"/logback.xml) | ||
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| TABLE_JAR_PATH=`echo "$FLINK_ROOT_DIR"/opt/flink-table*.jar` | ||
| exec $JAVA_RUN $JVM_ARGS "${log_setting[@]}" -cp ${FLINK_CLASSPATH}:${TABLE_JAR_PATH} ${DRIVER} ${ARGS[@]} |
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26 changes: 26 additions & 0 deletions
26
flink-dist/src/main/resources/META-INF/licenses/LICENSE.py4j
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| Copyright (c) 2009-2018, Barthelemy Dagenais and individual contributors. All | ||
| rights reserved. | ||
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| Redistribution and use in source and binary forms, with or without | ||
| modification, are permitted provided that the following conditions are met: | ||
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| - Redistributions of source code must retain the above copyright notice, this | ||
| list of conditions and the following disclaimer. | ||
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| - Redistributions in binary form must reproduce the above copyright notice, | ||
| this list of conditions and the following disclaimer in the documentation | ||
| and/or other materials provided with the distribution. | ||
|
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| - The name of the author may not be used to endorse or promote products | ||
| derived from this software without specific prior written permission. | ||
|
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| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | ||
| AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
| IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | ||
| DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE | ||
| FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||
| DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | ||
| SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | ||
| CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | ||
| OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | ||
| OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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