[97] | 1 | package com.framsticks.communication; |
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| 2 | |
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| 3 | import com.framsticks.communication.queries.ApplicationRequest; |
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[99] | 4 | import com.framsticks.communication.queries.CallRequest; |
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[97] | 5 | import com.framsticks.communication.queries.ProtocolRequest; |
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[99] | 6 | import com.framsticks.communication.queries.RegisterRequest; |
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[97] | 7 | import com.framsticks.communication.queries.UseRequest; |
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| 8 | import com.framsticks.communication.queries.VersionRequest; |
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[99] | 9 | import com.framsticks.core.Path; |
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[97] | 10 | import com.framsticks.params.ListSource; |
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| 11 | import com.framsticks.util.*; |
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| 12 | import com.framsticks.util.dispatching.AtOnceDispatcher; |
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| 13 | import com.framsticks.util.dispatching.Dispatcher; |
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| 14 | import com.framsticks.util.dispatching.Dispatching; |
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| 15 | import com.framsticks.util.dispatching.ExceptionResultHandler; |
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| 16 | import com.framsticks.util.dispatching.Future; |
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| 17 | import com.framsticks.util.dispatching.FutureHandler; |
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| 18 | import com.framsticks.util.dispatching.JoinableState; |
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| 19 | import com.framsticks.util.lang.Pair; |
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| 20 | import com.framsticks.util.lang.Strings; |
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[99] | 21 | import com.framsticks.params.EventListener; |
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[97] | 22 | |
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| 23 | import org.apache.log4j.Logger; |
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| 24 | |
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| 25 | import java.util.*; |
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| 26 | import java.util.regex.Matcher; |
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| 27 | import com.framsticks.util.dispatching.RunAt; |
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| 28 | |
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| 29 | /** |
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| 30 | * @author Piotr Sniegowski |
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| 31 | */ |
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| 32 | public class ClientSideManagedConnection extends ManagedConnection { |
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| 33 | |
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| 34 | private final static Logger log = Logger.getLogger(ClientSideManagedConnection.class); |
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| 35 | |
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| 36 | private final List<Runnable> applicationRequestsBuffer = new LinkedList<>(); |
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| 37 | private boolean isHandshakeDone = false; |
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| 38 | |
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[99] | 39 | |
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[97] | 40 | /** |
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| 41 | * @return the requestedVersion |
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| 42 | */ |
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| 43 | public int getRequestedVersion() { |
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| 44 | return requestedVersion; |
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| 45 | } |
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| 46 | |
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| 47 | /** |
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| 48 | * @param requestedVersion the requestedVersion to set |
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| 49 | */ |
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| 50 | public void setRequestedVersion(int requestedVersion) { |
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| 51 | this.requestedVersion = requestedVersion; |
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| 52 | } |
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| 53 | |
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| 54 | protected int requestedVersion = 4; |
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| 55 | |
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| 56 | public ClientSideManagedConnection() { |
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| 57 | setDescription("client connection"); |
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| 58 | protocolVersion = -1; |
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| 59 | } |
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| 60 | |
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| 61 | |
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| 62 | private static abstract class InboundMessage { |
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| 63 | protected String currentFilePath; |
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| 64 | protected List<String> currentFileContent; |
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| 65 | protected final List<File> files = new ArrayList<File>(); |
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| 66 | |
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| 67 | public abstract void eof(); |
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| 68 | |
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| 69 | protected void initCurrentFile(String path) { |
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| 70 | currentFileContent = new LinkedList<String>(); |
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| 71 | currentFilePath = path; |
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| 72 | } |
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| 73 | |
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| 74 | protected void finishCurrentFile() { |
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| 75 | if (currentFileContent == null) { |
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| 76 | return; |
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| 77 | } |
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| 78 | files.add(new File(currentFilePath, new ListSource(currentFileContent))); |
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| 79 | currentFilePath = null; |
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| 80 | currentFileContent = null; |
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| 81 | } |
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| 82 | |
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| 83 | public abstract void startFile(String path); |
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| 84 | |
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| 85 | public final void addLine(String line) { |
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| 86 | assert line != null; |
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| 87 | assert currentFileContent != null; |
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| 88 | currentFileContent.add(line); |
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| 89 | } |
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| 90 | |
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| 91 | public List<File> getFiles() { |
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| 92 | return files; |
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| 93 | } |
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| 94 | } |
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| 95 | |
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[99] | 96 | protected List<String> readFileContent() { |
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| 97 | List<String> content = new LinkedList<String>(); |
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| 98 | String line; |
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| 99 | while (!(line = getLine()).startsWith("eof")) { |
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| 100 | content.add(line); |
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[97] | 101 | } |
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[99] | 102 | return content; |
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[97] | 103 | } |
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| 104 | |
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| 105 | private static class SentQuery<C> extends InboundMessage { |
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| 106 | Request request; |
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| 107 | ClientSideResponseFuture callback; |
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| 108 | Dispatcher<C> dispatcher; |
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| 109 | |
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| 110 | public void startFile(String path) { |
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| 111 | finishCurrentFile(); |
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| 112 | if (!Strings.notEmpty(path)) { |
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| 113 | assert request instanceof ApplicationRequest; |
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| 114 | path = ((ApplicationRequest) request).getPath(); |
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| 115 | } |
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| 116 | Strings.assureNotEmpty(path); |
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| 117 | initCurrentFile(path); |
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| 118 | } |
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| 119 | |
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| 120 | public void eof() { |
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| 121 | assert Strings.notEmpty(currentFilePath); |
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| 122 | finishCurrentFile(); |
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| 123 | //no-operation |
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| 124 | } |
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| 125 | |
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| 126 | @Override |
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| 127 | public String toString() { |
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| 128 | return request.toString(); |
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| 129 | } |
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| 130 | |
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| 131 | public void dispatchResponseProcess(final Response response) { |
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| 132 | Dispatching.dispatchIfNotActive(dispatcher, new RunAt<C>(callback) { |
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| 133 | @Override |
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| 134 | protected void runAt() { |
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| 135 | callback.pass(response); |
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| 136 | } |
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| 137 | }); |
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| 138 | } |
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| 139 | } |
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| 140 | |
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| 141 | private Map<Integer, SentQuery<?>> queryMap = new HashMap<>(); |
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| 142 | |
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| 143 | private SentQuery<?> currentlySentQuery; |
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| 144 | |
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| 145 | public void send(ProtocolRequest request, ClientSideResponseFuture callback) { |
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| 146 | //TODO RunAt |
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| 147 | sendImplementation(request, AtOnceDispatcher.getInstance(), callback); |
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| 148 | } |
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| 149 | |
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| 150 | |
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| 151 | |
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| 152 | public <C> void send(final ApplicationRequest request, final Dispatcher<C> dispatcher, final ClientSideResponseFuture callback) { |
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| 153 | synchronized (applicationRequestsBuffer) { |
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| 154 | if (!isHandshakeDone) { |
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| 155 | applicationRequestsBuffer.add(new Runnable() { |
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| 156 | @Override |
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| 157 | public void run() { |
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| 158 | sendImplementation(request, dispatcher, callback); |
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| 159 | } |
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| 160 | }); |
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| 161 | return; |
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| 162 | } |
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| 163 | } |
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| 164 | sendImplementation(request, dispatcher, callback); |
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| 165 | } |
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| 166 | |
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| 167 | private <C> void sendImplementation(Request request, Dispatcher<C> dispatcher, ClientSideResponseFuture callback) { |
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[98] | 168 | callback.setRequest(request); |
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[97] | 169 | |
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| 170 | if (getState().ordinal() > JoinableState.RUNNING.ordinal()) { |
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| 171 | log.fatal("not connected"); |
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| 172 | return; |
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| 173 | } |
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| 174 | |
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| 175 | final SentQuery<C> sentQuery = new SentQuery<C>(); |
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| 176 | sentQuery.request = request; |
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| 177 | sentQuery.callback = callback; |
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| 178 | sentQuery.dispatcher = dispatcher; |
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| 179 | |
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| 180 | senderThread.dispatch(new RunAt<Connection>(callback) { |
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| 181 | @Override |
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| 182 | protected void runAt() { |
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| 183 | Integer id; |
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| 184 | synchronized (ClientSideManagedConnection.this) { |
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| 185 | |
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| 186 | while (!(requestIdEnabled || currentlySentQuery == null)) { |
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| 187 | try { |
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| 188 | ClientSideManagedConnection.this.wait(); |
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| 189 | } catch (InterruptedException ignored) { |
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| 190 | break; |
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| 191 | } |
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| 192 | } |
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| 193 | if (requestIdEnabled) { |
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| 194 | queryMap.put(nextQueryId, sentQuery); |
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| 195 | id = nextQueryId++; |
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| 196 | } else { |
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| 197 | currentlySentQuery = sentQuery; |
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| 198 | id = null; |
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| 199 | } |
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| 200 | } |
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| 201 | String command = sentQuery.request.getCommand(); |
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| 202 | StringBuilder message = new StringBuilder(); |
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| 203 | message.append(command); |
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| 204 | if (id != null) { |
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| 205 | message.append(" ").append(id); |
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| 206 | } |
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| 207 | message.append(" "); |
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| 208 | sentQuery.request.construct(message); |
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| 209 | String out = message.toString(); |
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| 210 | |
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| 211 | putLine(out); |
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| 212 | flushOut(); |
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| 213 | log.debug("sending query: " + out); |
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| 214 | |
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| 215 | } |
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| 216 | }); |
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| 217 | /* |
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| 218 | synchronized (this) { |
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| 219 | log.debug("queueing query: " + query); |
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| 220 | queryQueue.offer(sentQuery); |
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| 221 | notifyAll(); |
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| 222 | } |
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| 223 | */ |
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| 224 | } |
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| 225 | |
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| 226 | @Override |
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| 227 | public String toString() { |
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| 228 | return "client connection " + address; |
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| 229 | } |
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| 230 | |
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| 231 | |
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| 232 | private void sendQueryVersion(final int version, final Future<Void> future) { |
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| 233 | send(new VersionRequest().version(version), new ClientSideResponseFuture(future) { |
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| 234 | @Override |
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| 235 | protected void processOk(Response response) { |
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| 236 | protocolVersion = version; |
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| 237 | if (version < requestedVersion) { |
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| 238 | /** it is an implicit loop here*/ |
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| 239 | sendQueryVersion(version + 1, future); |
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| 240 | return; |
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| 241 | } |
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| 242 | send(new UseRequest().feature("request_id"), new ClientSideResponseFuture(future) { |
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| 243 | |
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| 244 | @Override |
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| 245 | protected void processOk(Response response) { |
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| 246 | requestIdEnabled = true; |
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| 247 | future.pass(null); |
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| 248 | } |
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| 249 | }); |
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| 250 | |
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| 251 | } |
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| 252 | }); |
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| 253 | } |
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| 254 | |
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| 255 | private synchronized SentQuery<?> fetchQuery(Integer id, boolean remove) { |
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| 256 | if (id == null) { |
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| 257 | if (requestIdEnabled) { |
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| 258 | return null; |
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| 259 | } |
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| 260 | SentQuery<?> result = currentlySentQuery; |
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| 261 | if (remove) { |
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| 262 | currentlySentQuery = null; |
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| 263 | notifyAll(); |
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| 264 | } |
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| 265 | return result; |
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| 266 | } |
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| 267 | if (queryMap.containsKey(id)) { |
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| 268 | SentQuery<?> result = queryMap.get(id); |
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| 269 | if (remove) { |
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| 270 | queryMap.remove(id); |
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| 271 | } |
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| 272 | return result; |
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| 273 | } |
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| 274 | return null; |
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| 275 | } |
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| 276 | |
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| 277 | private int nextQueryId = 0; |
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| 278 | |
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| 279 | protected void processMessage(InboundMessage inboundMessage) { |
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| 280 | if (inboundMessage == null) { |
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| 281 | log.error("failed to use any inbound message"); |
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| 282 | return; |
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| 283 | } |
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| 284 | |
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| 285 | String line; |
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| 286 | while (!(line = getLine()).startsWith("eof")) { |
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| 287 | // log.debug("line: " + line); |
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| 288 | inboundMessage.addLine(line); |
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| 289 | } |
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| 290 | inboundMessage.eof(); |
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| 291 | } |
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| 292 | |
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| 293 | protected void processEvent(String rest) { |
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| 294 | Matcher matcher = Request.EVENT_PATTERN.matcher(rest); |
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| 295 | if (!matcher.matches()) { |
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[99] | 296 | throw new FramsticksException().msg("invalid event line").arg("rest", rest); |
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[97] | 297 | } |
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[99] | 298 | String fileLine = getLine(); |
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| 299 | if (!fileLine.equals("file")) { |
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| 300 | throw new FramsticksException().msg("expected file line").arg("got", fileLine); |
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[97] | 301 | } |
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[99] | 302 | String eventObjectPath = Request.takeGroup(rest, matcher, 1).toString(); |
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| 303 | String eventCalleePath = Request.takeGroup(rest, matcher, 2).toString(); |
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| 304 | final File file = new File("", new ListSource(readFileContent())); |
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| 305 | log.debug("firing event " + eventObjectPath); |
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| 306 | EventListener<File> listener; |
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| 307 | synchronized (registeredListeners) { |
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| 308 | listener = registeredListeners.get(eventObjectPath); |
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| 309 | } |
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| 310 | if (listener == null) { |
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| 311 | throw new FramsticksException().msg("failed to find registered event").arg("event path", eventObjectPath).arg("object", eventCalleePath); |
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| 312 | } |
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| 313 | listener.action(file); |
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[97] | 314 | } |
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| 315 | |
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| 316 | protected void processMessageStartingWith(String line) { |
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| 317 | try { |
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| 318 | Pair<CharSequence, CharSequence> command = Request.takeIdentifier(line); |
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| 319 | if (command.first.equals("event")) { |
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| 320 | processEvent(command.second.toString()); |
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| 321 | return; |
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| 322 | } |
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| 323 | Pair<Integer, CharSequence> rest = takeRequestId(command.second); |
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| 324 | |
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| 325 | if (command.first.equals("file")) { |
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| 326 | SentQuery<?> sentQuery = fetchQuery(rest.first, false); |
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| 327 | sentQuery.startFile(rest.second.toString()); |
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| 328 | processMessage(sentQuery); |
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| 329 | return; |
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| 330 | } |
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| 331 | |
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| 332 | SentQuery<?> sentQuery = fetchQuery(rest.first, true); |
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| 333 | if (sentQuery == null) { |
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| 334 | return; |
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| 335 | } |
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| 336 | log.debug("parsing response for request " + sentQuery); |
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| 337 | |
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| 338 | sentQuery.dispatchResponseProcess(new Response(command.first.equals("ok"), rest.second.toString(), sentQuery.getFiles())); |
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| 339 | } catch (FramsticksException e) { |
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| 340 | throw new FramsticksException().msg("failed to process message").arg("starting with line", line).cause(e); |
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| 341 | } |
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| 342 | } |
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| 343 | |
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| 344 | protected final ExceptionResultHandler closeOnFailure = new ExceptionResultHandler() { |
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| 345 | |
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| 346 | @Override |
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| 347 | public void handle(FramsticksException exception) { |
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| 348 | interrupt(); |
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| 349 | // finish(); |
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| 350 | } |
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| 351 | }; |
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| 352 | |
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| 353 | @Override |
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| 354 | protected void receiverThreadRoutine() { |
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| 355 | startClientConnection(this); |
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| 356 | |
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| 357 | sendQueryVersion(1, new FutureHandler<Void>(closeOnFailure) { |
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| 358 | |
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| 359 | @Override |
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| 360 | protected void result(Void result) { |
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| 361 | synchronized (applicationRequestsBuffer) { |
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| 362 | isHandshakeDone = true; |
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| 363 | for (Runnable r : applicationRequestsBuffer) { |
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| 364 | r.run(); |
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| 365 | } |
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| 366 | applicationRequestsBuffer.clear(); |
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| 367 | } |
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| 368 | } |
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| 369 | }); |
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| 370 | |
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| 371 | processInputBatchesUntilClosed(); |
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| 372 | } |
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| 373 | |
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| 374 | protected void processNextInputBatch() { |
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| 375 | processMessageStartingWith(getLine()); |
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| 376 | } |
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| 377 | |
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[99] | 378 | protected final Map<String, EventListener<File>> registeredListeners = new HashMap<>(); |
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| 379 | |
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| 380 | public <C> void addListener(String path, final EventListener<File> listener, final Dispatcher<C> dispatcher, final Future<Void> future) { |
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| 381 | send(new RegisterRequest().path(path), dispatcher, new ClientSideResponseFuture(future) { |
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| 382 | @Override |
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| 383 | protected void processOk(Response response) { |
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| 384 | synchronized (registeredListeners) { |
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| 385 | registeredListeners.put(Path.validateString(response.getComment()), listener); |
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| 386 | } |
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| 387 | future.pass(null); |
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| 388 | } |
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| 389 | }); |
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| 390 | } |
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| 391 | |
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| 392 | public <C> void removeListener(EventListener<File> listener, final Dispatcher<C> dispatcher, final Future<Void> future) { |
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| 393 | String eventPath = null; |
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| 394 | synchronized (registeredListeners) { |
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| 395 | for (Map.Entry<String, EventListener<File>> e : registeredListeners.entrySet()) { |
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| 396 | if (e.getValue() == listener) { |
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| 397 | eventPath = e.getKey(); |
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| 398 | break; |
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| 399 | } |
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| 400 | } |
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| 401 | } |
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| 402 | if (eventPath == null) { |
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| 403 | future.handle(new FramsticksException().msg("listener is not registered").arg("listener", listener)); |
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| 404 | return; |
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| 405 | } |
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| 406 | |
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| 407 | final String finalEventPath = eventPath; |
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| 408 | //TODO add arguments to the exception |
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| 409 | send(new CallRequest().procedure("remove").path(eventPath), dispatcher, new ClientSideResponseFuture(future) { |
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| 410 | |
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| 411 | @Override |
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| 412 | protected void processOk(Response response) { |
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| 413 | synchronized (registeredListeners) { |
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| 414 | registeredListeners.remove(finalEventPath); |
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| 415 | } |
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| 416 | future.pass(null); |
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| 417 | } |
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| 418 | }); |
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| 419 | } |
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[97] | 420 | } |
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