be.solidx.hot.web.deprecated.ScriptExecutorController.java Source code

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Here is the source code for be.solidx.hot.web.deprecated.ScriptExecutorController.java

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package be.solidx.hot.web.deprecated;

/*
 * #%L
 * Hot
 * %%
 * Copyright (C) 2010 - 2016 Solidx
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.util.Map;

import org.apache.commons.io.IOUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.context.request.WebRequest;

import be.solidx.hot.HotPageCompiler;
import be.solidx.hot.Script;

public abstract class ScriptExecutorController<COMPILED_SCRIPT, DB> extends HotControllerImpl {

    protected static final Log LOGGER = LogFactory.getLog(ScriptExecutorController.class);

    protected WebScriptExecutor<COMPILED_SCRIPT, DB> scriptExecutor;

    protected Map<String, DB> dbMap;

    protected HotPageCompiler pageCompiler;

    public ResponseEntity<String> handleScript(WebRequest webRequest, String scriptName) {
        try {
            scriptName = scriptName + getScriptExtension();
            Script<COMPILED_SCRIPT> script = buildScript(IOUtils.toByteArray(loadResource(scriptName)), scriptName);
            StringWriter stringWriter = new StringWriter();
            PrintWriter printWriter = new PrintWriter(stringWriter);
            scriptExecutor.execute(script, webRequest, dbMap, printWriter);
            return new ResponseEntity<String>(stringWriter.toString(), httpHeaders, HttpStatus.ACCEPTED);
        } catch (Exception e) {
            StringWriter stringWriter = new StringWriter();
            printErrorPage(e, stringWriter);
            return new ResponseEntity<String>(stringWriter.toString(), httpHeaders, HttpStatus.ACCEPTED);
        }
    }

    public String handleScriptPOST(WebRequest webRequest, String scriptName, Writer writer) {
        try {
            scriptName = scriptName + getScriptExtension();
            Script<COMPILED_SCRIPT> script = buildScript(IOUtils.toByteArray(loadResource(scriptName)), scriptName);
            StringWriter stringWriter = new StringWriter();
            PrintWriter printWriter = new PrintWriter(stringWriter);
            Object result = scriptExecutor.execute(script, webRequest, dbMap, printWriter);
            printWriter.flush();
            stringWriter.flush();
            if (result == null)
                throw new Exception("POST handling scripts must return a page URL to redirect to");
            return "redirect:/" + (String) result;
        } catch (Exception e) {
            printErrorPage(e, writer);
            return null;
        }
    }

    public ResponseEntity<String> printHotPage(WebRequest webRequest, String page) {
        ResponseEntity<String> responseEntity;
        try {
            page = page + getPageExtension();
            Script<String> pageScript = new Script<String>(IOUtils.toByteArray(loadResource(page)), page);
            byte[] bytes = pageCompiler.compile(pageScript).getBytes("UTF-8");
            Script<COMPILED_SCRIPT> script = buildScript(bytes, page);
            StringWriter stringWriter = new StringWriter();
            PrintWriter printWriter = new PrintWriter(stringWriter);
            scriptExecutor.execute(script, webRequest, dbMap, printWriter);
            responseEntity = new ResponseEntity<String>(stringWriter.toString(), httpHeaders, HttpStatus.ACCEPTED);
        } catch (Exception e) {
            StringWriter writer = new StringWriter();
            printErrorPage(e, writer);
            responseEntity = new ResponseEntity<String>(writer.toString(), httpHeaders, HttpStatus.ACCEPTED);
        }
        return responseEntity;
    }

    protected abstract String getScriptExtension();

    protected abstract String getPageExtension();

    protected abstract Script<COMPILED_SCRIPT> buildScript(byte[] code, String name);
}