org.apache.hadoop.chukwa.rest.resource.ViewResource.java Source code

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Here is the source code for org.apache.hadoop.chukwa.rest.resource.ViewResource.java

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/*
 * 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.hadoop.chukwa.rest.resource;

import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.FormParam;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.QueryParam;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.Response;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.apache.hadoop.chukwa.rest.bean.ReturnCodeBean;
import org.apache.hadoop.chukwa.rest.bean.ViewBean;
import org.apache.hadoop.chukwa.datastore.ViewStore;
import org.apache.hadoop.chukwa.util.ExceptionUtil;

@Path("/view")
public class ViewResource {
    protected static Log log = LogFactory.getLog(ViewResource.class);

    @GET
    @Path("vid/{vid}")
    public ViewBean getView(@Context HttpServletRequest request, @PathParam("vid") String vid) {
        ViewStore view;
        ViewBean vr;
        String uid = request.getRemoteUser();
        try {
            view = new ViewStore(uid, vid);
            vr = view.get();
            if (request.getRemoteUser().intern() != vr.getOwner().intern()
                    && vr.getPermissionType().intern() != "public".intern()) {
                throw new WebApplicationException(
                        Response.status(Response.Status.FORBIDDEN).entity("permission denied.").build());
            }
        } catch (IllegalAccessException e) {
            throw new WebApplicationException(
                    Response.status(Response.Status.NOT_FOUND).entity("View does not exist.").build());
        }
        return vr;
    }

    @PUT
    @Consumes("application/json")
    public ReturnCodeBean setView(@Context HttpServletRequest request, ViewBean view) {
        try {
            if (request.getRemoteUser().intern() == view.getOwner().intern()) {
                ViewStore vs = new ViewStore(view.getOwner(), view.getName());
                vs.set(view);
            } else {
                throw new WebApplicationException(
                        Response.status(Response.Status.FORBIDDEN).entity("Permission denied.").build());
            }
        } catch (IllegalAccessException e) {
            log.error(ExceptionUtil.getStackTrace(e));
            throw new WebApplicationException(
                    Response.status(Response.Status.NOT_FOUND).entity("View save failed.").build());
        }
        return new ReturnCodeBean(ReturnCodeBean.SUCCESS, "Saved");
    }

    @POST
    @Path("permission")
    public ReturnCodeBean changeViewPermission(@Context HttpServletRequest request,
            @FormParam("owner") String owner, @FormParam("view_vid") String vid,
            @FormParam("permission") String permission) {
        try {
            if (owner.intern() == request.getRemoteUser().intern()) {
                ViewStore vs = new ViewStore(owner, vid);
                ViewBean view = vs.get();
                view.setPermissionType(permission);
                vs.set(view);
            } else {
                throw new Exception("Permission denied.");
            }
        } catch (Exception e) {
            log.error(ExceptionUtil.getStackTrace(e));
            throw new WebApplicationException(
                    Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity("View save failed.").build());
        }
        return new ReturnCodeBean(ReturnCodeBean.SUCCESS, "Saved");
    }

    @POST
    public ReturnCodeBean changeView(@Context HttpServletRequest request, @FormParam("owner") String owner,
            @FormParam("view_vid") String oldVid, @FormParam("view_name") String name) {
        try {
            ViewStore vs;
            if (oldVid != null) {
                vs = new ViewStore(owner, oldVid);
            } else {
                vs = new ViewStore(null, "default");
            }
            ViewBean view = vs.get();
            view.setOwner(request.getRemoteUser());
            view.setName(name);
            view.setDescription(name);
            if (oldVid == null) {
                view.setPermissionType("private");
            }
            vs = new ViewStore(request.getRemoteUser(), name);
            vs.set(view);
        } catch (Exception e) {
            log.error(ExceptionUtil.getStackTrace(e));
            throw new WebApplicationException(
                    Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity("View save failed.").build());
        }
        return new ReturnCodeBean(ReturnCodeBean.SUCCESS, "Saved");
    }

    @DELETE
    @Path("delete/{owner}/vid/{vid}")
    public ReturnCodeBean deleteView(@Context HttpServletRequest request, @PathParam("owner") String owner,
            @PathParam("vid") String vid) {
        try {
            if (owner.intern() == request.getRemoteUser().intern()) {
                log.info("owner: " + owner + " vid: " + vid);
                ViewStore vs = new ViewStore(owner, vid);
                vs.delete();
            } else {
                throw new WebApplicationException(
                        Response.status(Response.Status.FORBIDDEN).entity("View delete failed.").build());
            }
        } catch (Exception e) {
            log.error(ExceptionUtil.getStackTrace(e));
            throw new WebApplicationException(
                    Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity("View delete failed.").build());
        }
        return new ReturnCodeBean(ReturnCodeBean.SUCCESS, "Deleted");
    }

    @GET
    @Path("list")
    public String getUserViewList(@Context HttpServletRequest request) {
        String result = "";
        String uid = null;
        try {
            if (uid == null) {
                uid = request.getRemoteUser();
            }
            result = ViewStore.list(uid).toString();
        } catch (Exception e) {
            throw new WebApplicationException(
                    Response.status(Response.Status.NOT_FOUND).entity("View does not exist.").build());
        }
        return result;
    }
}