source: java/main/src/main/java/com/framsticks/hosting/ClientAtServer.java @ 103

package com.framsticks.hosting;

import static com.framsticks.util.lang.Strings.assureNotEmpty;

import com.framsticks.communication.*;
import com.framsticks.communication.queries.ApplicationRequest;
import com.framsticks.communication.queries.CallRequest;
import com.framsticks.communication.queries.GetRequest;
import com.framsticks.communication.queries.InfoRequest;
import com.framsticks.communication.queries.RegisterRequest;
import com.framsticks.communication.queries.SetRequest;
import com.framsticks.core.LocalTree;
import com.framsticks.core.Tree;
import com.framsticks.core.Path;
import com.framsticks.params.*;
import com.framsticks.params.types.EventParam;
import com.framsticks.params.types.ProcedureParam;
import com.framsticks.parsers.Savers;
import com.framsticks.util.FramsticksException;
import com.framsticks.util.Misc;
import com.framsticks.util.dispatching.AbstractJoinable;
import com.framsticks.util.dispatching.Dispatching;
import com.framsticks.util.dispatching.ExceptionResultHandler;
import com.framsticks.util.dispatching.FutureHandler;
import com.framsticks.util.dispatching.Joinable;
import com.framsticks.util.dispatching.JoinableParent;
import com.framsticks.util.dispatching.JoinableState;
import com.framsticks.util.lang.FlagsUtil;
import com.framsticks.util.lang.Strings;

import static com.framsticks.core.TreeOperations.*;
import static com.framsticks.params.AccessOperations.*;

import java.net.Socket;

/**
 * @author Piotr Sniegowski
 */
public class ClientAtServer extends AbstractJoinable implements RequestHandler, JoinableParent, ExceptionResultHandler {

        protected final Server server;
        protected final Tree contentTree;
        protected final Object treeRootObject;
        protected final ServerSideManagedConnection connection;

        protected final Cli cliObject;
        protected final LocalTree rootTree;


        protected final FramsClass rootFramsClass;
        protected final Object root;
        protected final String contentPrefix;

        public ClientAtServer(Server server, Socket socket) {
                this.server = server;
                this.contentTree = server.hosted;
                this.connection = new ServerSideManagedConnection(socket, this);

                treeRootObject = contentTree.getAssignedRoot().getObject();
                Misc.throwIfNull(treeRootObject);

                cliObject = new Cli(this);
                rootTree = new LocalTree();
                rootTree.setName(server.getName() + " root tree");
                // rootTree.setDispatcher(new AtOnceDispatcher<Tree>());
                rootTree.setDispatcher(server.getHosted().getDispatcher());
                assert rootTree.getDispatcher() != null;

                final FramsClass framsClass = bindAccess(contentTree.getAssignedRoot()).getFramsClass();
                final String id = Strings.uncapitalize(framsClass.getName());
                contentPrefix = "/" + id;
                final String rootFramsClassId = id + "Root";

                rootFramsClass = FramsClass.build()
                        .idAndName(rootFramsClassId)
                        .param(Param.build().id(id).name(framsClass.getName()).type("o " + framsClass.getId()))
                        .param(Param.build().id("cli").name("CLI").type("o Cli"))
                        .param(Param.build().id("system").name("Operating system").type("s").flags(ParamFlags.READONLY))
                        .param(Param.build().id("user").name("User name").type("s").flags(ParamFlags.READONLY))
                        .finish();

                // rootTree.putInfoIntoCache(rootFramsClass);
                rootTree.getRegistry().putFramsClass(rootFramsClass);
                rootTree.getRegistry().registerAndBuild(Cli.class);
                rootTree.getRegistry().registerAndBuild(CliEvent.class);

                Access access = new PropertiesAccess(rootFramsClass);

                root = createAccessee(rootTree, access);
                access.select(root);
                access.set(id, treeRootObject);
                access.set("cli", cliObject);
                access.set("system", System.getProperties().getProperty("os.name") + " " + System.getProperties().getProperty("os.version") + " " + System.getProperties().getProperty("os.arch"));
                access.set("user", System.getProperties().getProperty("user.name"));

                rootTree.assignRootParam(access.buildParam(new ParamBuilder()).name(rootFramsClassId).finish(CompositeParam.class));
                rootTree.assignRootObject(root);

        }

        @Override
        public String getName() {
                return connection + " to " + server;
        }

        @Override
        public void handle(final ApplicationRequest request, final ServerSideResponseFuture responseCallback) {
                assureNotEmpty(request.getPath());

                if (request.getPath().startsWith(contentPrefix)) {
                        String p = request.getPath().substring(contentPrefix.length());
                        request.path(p.equals("") ? "/" : p);
                        handleInTree(contentTree, request, responseCallback, contentPrefix);
                        return;
                }

                handleInTree(rootTree, request, responseCallback, "");
        }

        public static File printToFile(String path, Access access) {
                ListSink sink = new ListSink();
                save(access, sink);
                return new File(path, new ListSource(sink.getOut()));
        }

        protected void handleInTree(final Tree tree, final ApplicationRequest request, final ServerSideResponseFuture responseCallback, final String usedPrefix) {

                tryGet(tree, request.getActualPath(), new FutureHandler<Path>(responseCallback) {
                        @Override
                        protected void result(final Path path) {

                                if (!path.getTextual().equals(request.getActualPath())) {
                                        throw new FramsticksException().msg("invalid path").arg("path", request.getActualPath());
                                }

                                // final Access access = tree.prepareAccess(path);
                                final Access access = bindAccess(path);

                                if (request instanceof GetRequest) {
                                        Object result = path.getTopObject();
                                        if (result != access.getSelected()) {
                                                throw new FramsticksException().msg("mismatch objects during fetch").arg("path", path);
                                        }
                                        responseCallback.pass(new Response(true, "", File.single(printToFile(path.getTextual(), access))));

                                        return;
                                }

                                if (request instanceof SetRequest) {
                                        SetRequest setRequest = (SetRequest) request;
                                        tree.set(path, access.getFramsClass().getParamEntry(setRequest.getField(), PrimitiveParam.class), setRequest.getValue(), new FutureHandler<Integer>(responseCallback) {
                                                @Override
                                                protected void result(Integer flag) {
                                                        responseCallback.pass(new Response(true, FlagsUtil.write(SetStateFlags.class, flag, null), null));

                                                }
                                        });
                                        return;
                                }

                                if (request instanceof CallRequest) {
                                        final CallRequest callRequest = (CallRequest) request;
                                        tree.call(path, access.getFramsClass().getParamEntry(callRequest.getProcedure(), ProcedureParam.class), callRequest.getArguments().toArray(), Object.class, new FutureHandler<Object>(responseCallback) {
                                                @Override
                                                protected void result(Object result) {
                                                        ListSink sink = new ListSink();
                                                        sink.print("Result:").breakLine();
                                                        sink.print("value:");
                                                        sink.print("[");
                                                        if (result != null) {
                                                                sink.print(result);
                                                        }
                                                        sink.print("]");

                                                        responseCallback.pass(new Response(true, "", File.single(new File("", new ListSource(sink.getOut())))));
                                                }
                                        });
                                        return;
                                }

                                if (request instanceof InfoRequest) {
                                        FramsClass framsClass = getInfo(path);
                                        if (framsClass == null) {
                                                throw new FramsticksException().msg("info should be available");
                                        }
                                        responseCallback.pass(new Response(true, null, File.single(new File(path.getTextual(), new ListSource(Savers.saveFramsClass(new ListSink(), framsClass).getOut())))));
                                        return;
                                }

                                if (request instanceof RegisterRequest) {
                                        RegisterRequest register = (RegisterRequest) request;

                                        cliObject.addListener(path, access.getFramsClass().getParamEntry(register.getEventName(), EventParam.class), usedPrefix, responseCallback);
                                        return;
                                }

                                throw new FramsticksException().msg("invalid request type: " + request.getCommand());
                        }
                });

        }

        @Override
        protected void joinableStart() {
                Dispatching.use(connection, this);
                Dispatching.use(rootTree, this);
        }

        @Override
        protected void joinableInterrupt() {
                Dispatching.drop(rootTree, this);
                Dispatching.drop(connection, this);
        }

        @Override
        protected void joinableFinish() {

        }

        @Override
        protected void joinableJoin() throws InterruptedException {
                Dispatching.join(connection);
                Dispatching.join(rootTree);
        }

        @Override
        public void childChangedState(Joinable joinable, JoinableState state) {
                proceedToState(state);
        }

        @Override
        public void handle(FramsticksException exception) {
                contentTree.handle(exception);
        }

        /**
         * @return the tree
         */
        public Tree getTree() {
                return contentTree;
        }

}