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Java-based middleware for in-memory processing of big data in a distributed environment.
/*
* 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.ignite.internal.igfs.common;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.ArrayList;
import java.util.Collection;
import org.apache.ignite.IgniteCheckedException;
import org.apache.ignite.igfs.IgfsBlockLocation;
import org.apache.ignite.igfs.IgfsCorruptedFileException;
import org.apache.ignite.igfs.IgfsDirectoryNotEmptyException;
import org.apache.ignite.igfs.IgfsException;
import org.apache.ignite.igfs.IgfsFile;
import org.apache.ignite.igfs.IgfsInvalidHdfsVersionException;
import org.apache.ignite.igfs.IgfsParentNotDirectoryException;
import org.apache.ignite.igfs.IgfsPath;
import org.apache.ignite.igfs.IgfsPathAlreadyExistsException;
import org.apache.ignite.igfs.IgfsPathNotFoundException;
import org.apache.ignite.igfs.IgfsPathSummary;
import org.apache.ignite.internal.processors.igfs.IgfsBlockLocationImpl;
import org.apache.ignite.internal.processors.igfs.IgfsFileImpl;
import org.apache.ignite.internal.processors.igfs.IgfsHandshakeResponse;
import org.apache.ignite.internal.processors.igfs.IgfsInputStreamDescriptor;
import org.apache.ignite.internal.processors.igfs.IgfsModeResolver;
import org.apache.ignite.internal.processors.igfs.IgfsStatus;
import org.apache.ignite.internal.processors.igfs.IgfsUtils;
import org.apache.ignite.internal.util.tostring.GridToStringInclude;
import org.apache.ignite.internal.util.typedef.X;
import org.apache.ignite.internal.util.typedef.internal.S;
import org.apache.ignite.internal.util.typedef.internal.U;
import static org.apache.ignite.internal.igfs.common.IgfsIpcCommand.CONTROL_RESPONSE;
/**
* IGFS path command response.
*/
public class IgfsControlResponse extends IgfsMessage {
/** Generic error (not IGFS) while performing operations. */
private static final int ERR_GENERIC = 0;
/** Generic IGFS error while performing operations. */
private static final int ERR_IGFS_GENERIC = 1;
/** Target file not found. */
private static final int ERR_FILE_NOT_FOUND = 2;
/** Target path already exists. */
private static final int ERR_PATH_ALREADY_EXISTS = 3;
/** Directory is not empty with */
private static final int ERR_DIRECTORY_NOT_EMPTY = 4;
/** Target parent is not a directory. */
private static final int ERR_PARENT_NOT_DIRECTORY = 5;
/** Secondary HDFS version differs from classpath version. */
private static final int ERR_INVALID_HDFS_VERSION = 6;
/** Failed to retrieve file's data block. */
private static final int ERR_CORRUPTED_FILE = 7;
/** Response is boolean. */
public static final int RES_TYPE_BOOLEAN = 0;
/** Response is Long. */
public static final int RES_TYPE_LONG = 1;
/** Response is IgfsFile. */
public static final int RES_TYPE_IGFS_FILE = 2;
/** Response is IgfsFileInfo. */
public static final int RES_TYPE_IGFS_STREAM_DESCRIPTOR = 3;
/** Response is IgfsPath. */
public static final int RES_TYPE_IGFS_PATH = 4;
/** Response is collection of IgfsFile. */
public static final int RES_TYPE_COL_IGFS_FILE = 5;
/** Response is collection of IgfsPath. */
public static final int RES_TYPE_COL_IGFS_PATH = 6;
/** Response is collection of IgfsBlockLocation. */
public static final int RES_TYPE_COL_IGFS_BLOCK_LOCATION = 7;
/** Response is collection of IgfsBlockLocation. */
public static final int RES_TYPE_BYTE_ARRAY = 8;
/** Response is an error containing stream ID and error message. */
public static final int RES_TYPE_ERR_STREAM_ID = 9;
/** Response is a handshake */
public static final int RES_TYPE_HANDSHAKE = 10;
/** Response is a handshake */
public static final int RES_TYPE_STATUS = 11;
/** Response is a path summary. */
public static final int RES_TYPE_IGFS_PATH_SUMMARY = 12;
/** Response is a path summary. */
public static final int RES_TYPE_MODE_RESOLVER = 13;
/** Message header size. */
public static final int RES_HEADER_SIZE = 9;
/** We have limited number of object response types. */
private int resType = -1;
/** Response. */
@GridToStringInclude
private Object res;
/** Bytes length to avoid iteration and summing. */
private int len;
/** Error (if any). */
private String err;
/** Error code. */
private int errCode = -1;
/**
*
*/
public IgfsControlResponse() {
command(CONTROL_RESPONSE);
}
/**
* @return Response.
*/
public Object response() {
return res;
}
/**
* @param res Response.
*/
public void response(boolean res) {
resType = RES_TYPE_BOOLEAN;
this.res = res;
}
/**
* @param res Response.
*/
public void response(long res) {
resType = RES_TYPE_LONG;
this.res = res;
}
/**
* @param res Response.
*/
public void response(byte[][] res) {
resType = RES_TYPE_BYTE_ARRAY;
this.res = res;
}
/**
* @param res Response.
*/
public void response(IgfsInputStreamDescriptor res) {
resType = RES_TYPE_IGFS_STREAM_DESCRIPTOR;
this.res = res;
}
/**
* @param res Response.
*/
public void response(IgfsFile res) {
resType = RES_TYPE_IGFS_FILE;
this.res = res;
}
/**
* @param res Response.
*/
public void response(IgfsPath res) {
resType = RES_TYPE_IGFS_PATH;
this.res = res;
}
/**
* @param res Path summary response.
*/
public void response(IgfsPathSummary res) {
resType = RES_TYPE_IGFS_PATH_SUMMARY;
this.res = res;
}
/**
* @param res Response.
*/
public void files(Collection res) {
resType = RES_TYPE_COL_IGFS_FILE;
this.res = res;
}
/**
* @param res Response.
*/
public void paths(Collection res) {
resType = RES_TYPE_COL_IGFS_PATH;
this.res = res;
}
/**
* @param res Response.
*/
public void locations(Collection res) {
resType = RES_TYPE_COL_IGFS_BLOCK_LOCATION;
this.res = res;
}
/**
* @param res Handshake message.
*/
public void handshake(IgfsHandshakeResponse res) {
resType = RES_TYPE_HANDSHAKE;
this.res = res;
}
/**
* @param res Status response.
*/
public void status(IgfsStatus res) {
resType = RES_TYPE_STATUS;
this.res = res;
}
/**
* @param res Status response.
*/
public void modeResolver(IgfsModeResolver res) {
resType = RES_TYPE_MODE_RESOLVER;
this.res = res;
}
/**
* @param len Response length.
*/
public void length(int len) {
this.len = len;
}
/**
* @return Error message if occurred.
*/
public boolean hasError() {
return errCode != -1;
}
/**
* @param errCode Error code.
* @param err Error.
* @throws IgniteCheckedException Based on error code.
*/
public static void throwError(Integer errCode, String err) throws IgniteCheckedException {
assert err != null;
assert errCode != -1;
if (errCode == ERR_FILE_NOT_FOUND)
throw new IgfsPathNotFoundException(err);
else if (errCode == ERR_PATH_ALREADY_EXISTS)
throw new IgfsPathAlreadyExistsException(err);
else if (errCode == ERR_DIRECTORY_NOT_EMPTY)
throw new IgfsDirectoryNotEmptyException(err);
else if (errCode == ERR_PARENT_NOT_DIRECTORY)
throw new IgfsParentNotDirectoryException(err);
else if (errCode == ERR_INVALID_HDFS_VERSION)
throw new IgfsInvalidHdfsVersionException(err);
else if (errCode == ERR_CORRUPTED_FILE)
throw new IgfsCorruptedFileException(err);
else if (errCode == ERR_IGFS_GENERIC)
throw new IgfsException(err);
throw new IgniteCheckedException(err);
}
/**
* @throws IgniteCheckedException Based on error code.
*/
public void throwError() throws IgniteCheckedException {
throwError(errCode, err);
}
/**
* @return Error code.
*/
public int errorCode() {
return errCode;
}
/**
* @param e Error if occurred.
*/
public void error(IgniteCheckedException e) {
err = e.getMessage();
errCode = errorCode(e);
}
/**
* @param streamId Stream ID.
* @param err Error message if occurred.
*/
public void error(long streamId, String err) {
resType = RES_TYPE_ERR_STREAM_ID;
res = streamId;
errCode = ERR_GENERIC;
this.err = err;
}
/**
* Gets error code based on exception class.
*
* @param e Exception to analyze.
* @return Error code.
*/
private int errorCode(IgniteCheckedException e) {
return errorCode(e, true);
}
/**
* Gets error code based on exception class.
*
* @param e Exception to analyze.
* @param checkIo Whether to check for IO exception.
* @return Error code.
*/
private int errorCode(IgniteCheckedException e, boolean checkIo) {
if (X.hasCause(e, IgfsPathNotFoundException.class))
return ERR_FILE_NOT_FOUND;
else if (e.hasCause(IgfsPathAlreadyExistsException.class))
return ERR_PATH_ALREADY_EXISTS;
else if (e.hasCause(IgfsDirectoryNotEmptyException.class))
return ERR_DIRECTORY_NOT_EMPTY;
else if (e.hasCause(IgfsParentNotDirectoryException.class))
return ERR_PARENT_NOT_DIRECTORY;
else if (e.hasCause(IgfsInvalidHdfsVersionException.class))
return ERR_INVALID_HDFS_VERSION;
else if (e.hasCause(IgfsCorruptedFileException.class))
return ERR_CORRUPTED_FILE;
// This check should be the last.
else if (e.hasCause(IgfsException.class))
return ERR_IGFS_GENERIC;
return ERR_GENERIC;
}
/**
* Writes object to data output. Do not use externalizable interface to avoid marshaller.
*
* @param out Data output.
* @throws IOException If error occurred.
*/
public void writeExternal(ObjectOutput out) throws IOException {
byte[] hdr = new byte[RES_HEADER_SIZE];
U.intToBytes(resType, hdr, 0);
int off = 4;
hdr[off++] = err != null ? (byte)1 : (byte)0;
if (resType == RES_TYPE_BYTE_ARRAY)
U.intToBytes(len, hdr, off);
out.write(hdr);
if (err != null) {
out.writeUTF(err);
out.writeInt(errCode);
if (resType == RES_TYPE_ERR_STREAM_ID)
out.writeLong((Long)res);
return;
}
switch (resType) {
case RES_TYPE_BOOLEAN:
out.writeBoolean((Boolean)res);
break;
case RES_TYPE_LONG:
out.writeLong((Long)res);
break;
case RES_TYPE_BYTE_ARRAY:
byte[][] buf = (byte[][])res;
for (byte[] bytes : buf)
out.write(bytes);
break;
case RES_TYPE_IGFS_PATH:
case RES_TYPE_IGFS_PATH_SUMMARY:
case RES_TYPE_IGFS_FILE:
case RES_TYPE_IGFS_STREAM_DESCRIPTOR:
case RES_TYPE_HANDSHAKE:
case RES_TYPE_MODE_RESOLVER:
case RES_TYPE_STATUS: {
out.writeBoolean(res != null);
if (res != null)
((Externalizable)res).writeExternal(out);
break;
}
case RES_TYPE_COL_IGFS_FILE:
case RES_TYPE_COL_IGFS_PATH:
case RES_TYPE_COL_IGFS_BLOCK_LOCATION: {
Collection items = (Collection)res;
if (items != null) {
out.writeInt(items.size());
for (Externalizable item : items)
item.writeExternal(out);
}
else
out.writeInt(-1);
break;
}
}
}
/**
* Reads object from data input.
*
* @param in Data input.
* @throws IOException If read failed.
* @throws ClassNotFoundException If could not find class.
*/
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
byte[] hdr = new byte[RES_HEADER_SIZE];
in.readFully(hdr);
resType = U.bytesToInt(hdr, 0);
boolean hasErr = hdr[4] != 0;
if (hasErr) {
err = in.readUTF();
errCode = in.readInt();
if (resType == RES_TYPE_ERR_STREAM_ID)
res = in.readLong();
return;
}
switch (resType) {
case RES_TYPE_BOOLEAN:
res = in.readBoolean();
break;
case RES_TYPE_LONG:
res = in.readLong();
break;
case RES_TYPE_IGFS_PATH: {
boolean hasVal = in.readBoolean();
if (hasVal)
res = IgfsUtils.readPath(in);
break;
}
case RES_TYPE_IGFS_PATH_SUMMARY: {
boolean hasVal = in.readBoolean();
if (hasVal) {
IgfsPathSummary sum = new IgfsPathSummary();
sum.readExternal(in);
res = sum;
}
break;
}
case RES_TYPE_IGFS_FILE: {
boolean hasVal = in.readBoolean();
if (hasVal) {
IgfsFileImpl file = new IgfsFileImpl();
file.readExternal(in);
res = file;
}
break;
}
case RES_TYPE_IGFS_STREAM_DESCRIPTOR: {
boolean hasVal = in.readBoolean();
if (hasVal) {
IgfsInputStreamDescriptor desc = new IgfsInputStreamDescriptor();
desc.readExternal(in);
res = desc;
}
break;
}
case RES_TYPE_HANDSHAKE: {
boolean hasVal = in.readBoolean();
if (hasVal) {
IgfsHandshakeResponse msg = new IgfsHandshakeResponse();
msg.readExternal(in);
res = msg;
}
break;
}
case RES_TYPE_STATUS: {
boolean hasVal = in.readBoolean();
if (hasVal) {
IgfsStatus msg = new IgfsStatus();
msg.readExternal(in);
res = msg;
}
break;
}
case RES_TYPE_COL_IGFS_FILE: {
Collection files = null;
int size = in.readInt();
if (size >= 0) {
files = new ArrayList<>(size);
for (int i = 0; i < size; i++) {
IgfsFileImpl file = new IgfsFileImpl();
file.readExternal(in);
files.add(file);
}
}
res = files;
break;
}
case RES_TYPE_COL_IGFS_PATH: {
Collection paths = null;
int size = in.readInt();
if (size >= 0) {
paths = new ArrayList<>(size);
for (int i = 0; i < size; i++)
paths.add(IgfsUtils.readPath(in));
}
res = paths;
break;
}
case RES_TYPE_COL_IGFS_BLOCK_LOCATION: {
Collection locations = null;
int size = in.readInt();
if (size >= 0) {
locations = new ArrayList<>(size);
for (int i = 0; i < size; i++) {
IgfsBlockLocationImpl location = new IgfsBlockLocationImpl();
location.readExternal(in);
locations.add(location);
}
}
res = locations;
break;
}
case RES_TYPE_MODE_RESOLVER: {
boolean hasVal = in.readBoolean();
if (hasVal) {
IgfsModeResolver msg = new IgfsModeResolver();
msg.readExternal(in);
res = msg;
}
break;
}
case RES_TYPE_BYTE_ARRAY:
assert false : "Response type of byte array should never be processed by marshaller.";
}
}
/** {@inheritDoc} */
@Override public String toString() {
return S.toString(IgfsControlResponse.class, this);
}
}